The reference number allows you to manage all campaign services, from consulting your tax data and your draft declaration, to its subsequent processing, regardless of the result.

We recommend that you obtain the reference from the APP of the Tax Agency , which allows for easier access to the most commonly used services throughout the Income Tax campaign.

You can also obtain the reference number online at the Tax Agency's Electronic Office at the link get your reference number . To access this service, you must identify yourself with Cl@ve PIN, with an electronic certificate or electronic DNI or with the amount in box 505 of your 2021 Income Tax return (if the amount is 0 or you did not file the return, you must provide the IBAN of your bank account).

In the video we show you how to obtain the reference number with box 505.