- Access to Renta WEB from your mobile phone can be done via Cl@ve, certificate or official app, with full legal validity.
- It is essential to review tax data, real estate and deductions before submitting the draft.
- The app allows for quick submission, splitting payments, and using methods such as direct debit, NRC, or Bizum.
- After submitting, a PDF receipt is generated and the status of the file can be tracked from your mobile phone.
Filing your tax return from your mobile phone is no longer just for experts. The Spanish Tax Agency has refined its online tax return system (Renta WEB) and its official app so much that, if you know what to review and how to identify yourself, you can submit your draft in a matter of minutes, without turning on your computer, and it will be fully valid with the Tax Agency.
However, just because the process is simple doesn't mean you should take it lightly. The draft is prepared by the Tax Agency, but the responsibility for ensuring the data is correct rests solely with you . Therefore, it's essential to know exactly how to access it from your mobile device, what access options you have (Cl@ve, digital certificate, SMS, reference number, etc.), how to review your tax information, and what steps to follow to file or amend your return without making a mistake.
Step-by-step tutorial: how to access Renta WEB from your mobile phone
The entire process is based on Renta WEB, the online service for processing draft and final tax returns, which works both in your mobile browser and is integrated into the official Tax Agency app. Through it, you can view, modify, and submit your individual or joint tax return, as well as correct one you have already submitted.
To access Renta WEB from your mobile device, you have two options: enter the AEAT Electronic Office through your browser (just as you would on a computer) or use the official Tax Agency app for Android or iOS . In both cases, you will end up in the same draft return processing system, although the app is designed for quick and direct use.
On the AEAT website, once you access the Income Tax campaign, you'll see the "Featured Services" section . There you'll find the key link: "Draft/Return Processing Service (Direct Income Tax and Online Income Tax) ." This is the same access point you'll see in the app, within the Income Tax section. From there, the system will ask you to log in.
Identification is mandatory for the Tax Agency to show you your tax information. You can access it with Cl@ve, an electronic certificate or electronic ID card (DNIe), or with a reference number (depending on the option you choose at any given time). From a mobile device, the most convenient options are usually Cl@ve and the Cl@ve app, but we'll look at all of them.
Access with Cl@ve from your mobile: QR code, ID details and PIN via SMS
If you're already registered with the Cl@ve system, you'll normally use this method. Cl@ve Móvil allows you to quickly identify yourself using the Cl@ve app installed on your phone, by scanning a QR code, or by receiving a PIN via SMS if you don't have the app configured.
When you select "Cl@ve Móvil" as your access method in Renta WEB, an authentication screen will open with a verification code, an expiration timer, and a QR code , along with instructions. In the Cl@ve app, simply tap the option to scan the QR code and focus the screen of your mobile phone or tablet on it.
After scanning the code, the Cl@ve app will display the authentication request. Verify that the verification code and the issuing authority (Tax Agency) match what you see in your browser and tap "Confirm." If everything is correct, a "Authorization successful" message will appear in the app, and you will automatically be logged into the Income Tax services on the website.
If you cannot or do not wish to scan the QR code, the Cl@ve Móvil screen includes the option “…continue with authentication via Cl@ve Móvil without scanning the QR code” . In that case, you will need to manually enter your National Identity Document (DNI) or Foreigner's Identity Number (NIE) and a verification piece of information that depends on the type of document:
- Expiration date, if your ID card has a normal expiry date.
- Expedition date, if your ID is permanent (01-01-9999).
- Support number, if it is a NIE.
At the bottom of this screen, you'll see a help link to locate the verification information on your document. After entering the information correctly, click "Continue," and a new window will appear with your ID/NIE number, the timer, and the verification code. Open the Cl@ve app, confirm the request (it usually requires a second security confirmation), and return to Renta WEB, where you'll have access to your file.
If you don't have the Cl@ve app activated or prefer to use a PIN via SMS , simply wait about 60 seconds on the authentication screen for the "ACCESS WITH A PIN VIA SMS" button to become available . When you tap it, you will receive a 6-digit PIN on your mobile phone, which you must enter in the "Access PIN" field and then tap "Access." This will also log you in with Cl@ve Móvil.
Log in with electronic certificate or electronic ID card from your phone
Another widely used method, especially if you manage multiple tax returns, is the electronic certificate or electronic ID card . From a mobile device, this option is viable as long as you have the digital certificate installed on the device or use a compatible method (some mobile browsers and systems support software certificates or NFC reading of the electronic ID card).
On the Tax Agency's Electronic Office website, when you go to the Income Tax campaign and click on "Draft/Return Processing Service (Direct Income Tax and Web Income Tax)" , you can select the "Electronic Certificate or ID" option . The system will show you the available certificates and you must choose yours to identify yourself.
Once the certificate is validated, the website will ask you about the type of action: on your own behalf or as a representative . This part is key if you are going to file someone else's tax return and you have a registered power of attorney, because it will allow you to act on their behalf completely legally, without asking for their login credentials.
After making that selection, you will access your tax return file, where you will see the option "Draft/Return Processing Service (Direct Income Tax and Online Income Tax)" in the "Available Services" section . From there, you can continue, retrieve a previous session, create a new return, or amend one already submitted, following the same steps as if you were logging in via Cl@ve.
How to use the Tax Agency's app for income tax from your mobile phone
The official AEAT app, available on Google Play for Android and the App Store for iOS , has become the preferred method for many taxpayers. It allows you to view your draft tax return, check the result, adjust some basic options, and submit your return in just a few taps.
First, install the app or update it to the latest version. When you open it, identify the taxpayer using one of these methods: tax reference number, Cl@ve system, electronic certificate, or electronic ID card (DNIe). Once authenticated, go to the "Income Tax" section and select "Income Tax 2025" (remember that the name refers to the tax year, even though you are filing it the following year).
Within that section, you'll see several options. The one we're interested in for the draft is "Processing draft/declaration ." By tapping it, the app connects to Renta WEB and displays your file, very similar to how you would see it in a browser, but optimized for small screens.
In many cases, if the Tax Agency has all your information and doesn't detect any outstanding issues, the app allows you to file with just one click . However, while it may be tempting, it's always wise to review your tax information, check your primary residence, bank accounts, and any rental properties, and only then file. If you need to make significant changes, you'll have to access the full web version through your mobile browser.
Continue session, start a new session, or modify a previously submitted statement
When you access Renta WEB (either from the app or the mobile browser), the system checks if you have already worked with your draft for that tax year . If it detects a saved return, it will display a pop-up window with two options: “Continue session” or “New return”.
If you choose "Continue session" , you will go directly to the "Declaration Summary" . From there, you can continue entering or correcting data using the "Declaration sections" button , view results by filing type (individual, spouse, joint) and, when you are ready, click on "Submit declaration" for the most favorable option.
If you select "New Declaration ," the system will load a window with the "Identification Data" of the taxpayer and the other members of the family unit . At the top, there is an important checkbox: "If you want the program to calculate only the taxpayer's individual declaration, check here ." If you only want the individual declaration, check this box so that the joint declaration and the declarations of other members are not calculated.
If you have already filed your tax return for that year, Renta WEB detects this and, in addition to allowing you to view what you submitted, will offer you the "Modify filed return" button . This option allows you to amend a previously filed return when you need to correct errors or add information that was not included at the time.
Identifying information and declarations with spouse and children
The "Identification Data" screen is one of the most sensitive steps in the entire process , because it records your family situation, marital status, and family members. Some of this information cannot be changed later, so it's best to review it carefully the first time.
From this window, you can correct or add information by double-clicking in the fields or by clicking the pencil icon. To remove family members, use the cross icon or the "Delete" button, depending on the version. Note that if any of the taxpayers are not required to file a tax return , the system will display an informational message.
If you are part of a family unit and have not checked the box to file only an individual return, you must authorize the data of your spouse and any children who have earned income . This is done by reference number, Cl@ve Móvil, or power of attorney. The goal is for the program to calculate both joint and individual returns and show you which is more advantageous.
In the "Spouse Authorization" section, you'll see a "Reference/Cl@ve" or "Reference/Cl@ve Mobile" button . Clicking it will open a window where you can enter the reference or identify your spouse using Cl@ve Mobile (DNI/NIE and verification data, confirmation in the app, or PIN via SMS). If everything goes well, the button will change to "Authorized," and the spouse's or children's income information will be added to the tax return.
There is also the option of granting power of attorney (code 100P) , which allows access to the data of spouses or children without needing to enter their reference or Cl@ve code in each session. If you have this power of attorney registered, you can simply click "Accept" at the bottom of the identification data screen and continue; the system will also provide the necessary tax information for joint calculation.
Transfer of tax data and notices of additional information
Once your identification details are confirmed, Renta WEB analyzes the available information and, based on that, may display a window with "additional information" necessary to correctly transfer certain data to your tax return . This is a key step to ensure the draft reflects everything the Tax Agency knows about you.
On that screen, you'll see a list of items and a column with "Yes" boxes under the heading "Incorporate ." Select "Yes" for the items you want to automatically transfer to the tax return. The system will then ask you additional questions or provide fields to complete (for example, specific details about properties, loans, ownership percentages, etc.).
If you don't require additional information or choose not to automatically populate certain data, you'll go directly to the tax return summary . If there is missing tax data, a window will appear indicating, for each taxpayer, exactly what that data is, so you can fill it in manually in the corresponding section.
The "View tax data" button is always available in the top bar of the Renta WEB website . From there, you can review all the information the Spanish Tax Agency (AEAT) has on record and consult the explanatory notes to better understand each entry. This is especially useful if you need to verify that income from employment, bank accounts, mortgages, rentals, or donations have been correctly included.
Statement summary, PDF preview, and notes
The "Tax Return Summary" is the command center of your draft tax return . Here you will find, for each possible filing type (individual return of the taxpayer, individual return of the spouse, joint return, children with filing obligations), the result of the tax assessment and the option that the program marks as most favorable based on the calculations.
From each of these statements, you can download a preview PDF . This document is not valid for submission, but it's perfect for calmly reviewing the figures on your mobile device or, if you prefer, printing it from another device. It's important to have a PDF viewer installed on your phone to open these files without problems.
At the top of the screen, you'll see a menu with several tools. The most notable are the "Declaration Sections" button, which allows you to navigate through all the sections (income, real estate, deductions, etc.), and the "Show Options" option , which displays additional buttons to review the identifying information, save the declaration to the AEAT servers, or search for a specific field.
In addition, Renta WEB includes a "Notes" button . This serves as an internal notepad for jotting down clarifications, amounts you want to review later, or any details that will help you finalize your tax return before submitting it . These notes are not sent to the Tax Agency; they are only for your use while completing the form.
Checking your tax return from your mobile phone: what to look at closely before filing
The ease with which you can see the result in the app might give a false sense of security, but it's crucial to take a few minutes to review the key information in the draft . Any undetected errors are your responsibility, not the Tax Agency's.
Among the information that should always be checked are employment income (salaries, pensions, benefits), bank accounts , and especially cadastral data and ownership details for your primary residence and other properties , such as second homes or rented properties. An error in these fields can significantly change the result.
Don't forget to check that all the deductions you're entitled to are listed . The online tax return system (Renta WEB) and the app may not include items like union dues, NGO donations, political party contributions, or certain regional tax deductions by default . You'll need to add these manually in the corresponding section.
The application itself will guide you through several screens where you can add these additional deductions and check their impact on the result. Ideally, you should review the tax data once, then the PDF preview again, and only then consider clicking the submission button.
Validating the declaration: notices, errors and warnings
Before clicking "Submit Declaration," it is highly recommended to use the "Validate" function , available at the top of the declaration. Doing so will allow the system to analyze the information provided and display warnings and errors if it detects inconsistencies or data that commonly cause problems.
The warnings do not prevent submission; they are suggestions to review a section that, based on the AEAT's experience, is often a source of oversight. Errors , however, do block submission until they are corrected. For quick access, you can use the "Go to Warning" or "Go to Error" buttons , which take you directly to the affected field.
In some cases, you may receive "Warnings" during the validation process . These are intermediate messages that the system requires you to read. To continue, you must go to the warning and check the "Read/Hide" box , which confirms that you have viewed the content. If you don't do this, Renta WEB will not allow you to proceed and will display the message "Review the warnings before submitting your return."
Only when the declaration is error-free and you clearly understand the notices and warnings is it worthwhile to proceed to the filing stage. A few extra minutes of review can save you from subsequent inquiries or even penalties if the error results in withholding money that was due.
Filing your tax return from your mobile phone: options and payment methods
Once the return has been validated and the result reviewed, it's time to decide which filing method to use . If you access the "File Return" button from the "Return Summary," Renta WEB will automatically select the method you have marked as your favorite at that moment (usually the most advantageous one according to the calculation).
If you access the filing form directly from the tax return window, you will need to manually select between "Joint Return" or "Individual Return ." In the case of an individual return, the system will display the available returns: the taxpayer, spouse, and, if applicable, children required to file.
When the result is a refund , the system will ask you how you want to handle it. You can request a transfer to a bank account in Spain or a foreign financial institution within the EU/SEPA area, or even to institutions outside the EU/SEPA. In the latter case, you must specify the country (non-EU/SEPA), account number, bank, city, and address (the SWIFT-BIC code is usually optional).
If your tax return results in a payment due , you'll first need to decide whether you want to split the payment into two installments or pay it all at once . Then, you can choose from several payment methods: direct debit, electronic payment by bank transfer, card, or Bizum, use of a pre-generated NRC (Taxpayer Identification Number), or a payment slip for deposit at a bank/savings bank. In some cases, you can also acknowledge the debt with a request for deferral or pay by transfer to a non-collaborating financial institution.
Special options in the app: one click, installment payments, and Bizum
In the Tax Agency app, if everything is correct and the Tax Office has all your information, you may see the option to file your return "with a single click ." After confirming your tax address and reviewing the summary, simply tap "File return" for the app to send the form and display the receipt.
Before that step, the app lets you view your data, open a PDF preview, modify or add your bank account's IBAN, and configure your tax allocation (checking or unchecking the boxes for the Catholic Church and social purposes). These details can change both where part of your taxes goes and how you receive or make payments.
For tax returns due during the direct debit period (usually until June 25th) , the app defaults to two installments, with both amounts automatically debited. Outside of this period, the system defaults to a single payment with a bank/savings bank slip, although you can adjust the installment plan and payment method as permitted by the calendar.
The latest tax return includes an interesting new feature: payment via Bizum . It's available under "Electronic Payment" options, alongside direct debit and card payments. You'll need to provide the phone number associated with your Bizum account and confirm the payment through your bank's app. It's important to review the limits and conditions that each bank applies to payments to public bodies via Bizum to ensure your tax return amount falls within the permitted limits.
After choosing the payment method and completing the information, simply click “Accept” to submit the return . For joint returns or returns for children, the system may request the reference number or Cl@ve identification of the other taxpayer, even if the submitter is accessing the system with a digital certificate, electronic ID card (DNIe), or any other method.
Confirmation, PDF receipt and file tracking
Just before you submit your tax return, Renta WEB will display a box with any final notifications and a summary of what you're about to submit. If there are any notifications, you'll be informed so you can decide whether to continue . To proceed, you must check the "I agree" box and click the "Sign and Submit" button.
If everything goes well, a message will appear confirming that “Your submission has been successfully completed ,” along with the Secure Verification Code (CSV) . Additionally, a PDF will be generated that includes, on the first page, the registration details (entry number, CSV, receipt number, date and time of submission, submitter details) and, on subsequent pages, the complete declaration.
It's highly recommended to save this PDF to your phone or in the cloud , as it serves as legal proof of submission and will be useful for justifying your tax situation, checking details, or responding to any inquiries. You can also tap "View Submitted Return" in the app immediately after submitting to download or view it.
In declarations with acknowledgment of debt , the correct filing response sheet will include a specific link for "Process Debt." From there, you can manage a deferral, compensation, or payment , viewing all the settlement details and the associated code.
If you later return to "Renta WEB. Draft/Return Processing Service" , you will see a line in the "File History" section with the "Recording of your return" and the date it was filed. At the top, the message "Your return is being processed" usually appears while the Tax Agency reviews it and, if applicable, processes the refund or payment.
Filing your tax return from your mobile phone, whether using a browser or the official AEAT app, has become a streamlined process that combines the convenience of your phone with the same guarantees as if you were doing it from a computer ; the key is to securely identify yourself, calmly review your tax data, validate the return, and choose the payment or refund method that best suits your situation, knowing that you can always retrieve your receipt and track the status of your case without leaving your couch.
