Form 583 - Technical assistanceSkip information index
Filing a complementary self-assessment of form 583
To file a supplementary return, you must first locate the original return to which you are supplementing.It is mandatory to enter the NIF of the taxpayer to perform the search.However, to narrow down the results you can indicate the year, the period and the type of return (ordinary, supplementary or complementary).
The localised tax returns will be displayed in the table;to access the filing of the supplementary declaration, click on the link in the "Filing Date" column.
Consult the notice informing you of the cases in which a supplementary tax return must be filed.Then select the type of complementary self-assessment, depending on the result and the method of payment, and click on "Continue".
The form will be displayed with the details of the original return already uploaded and you will only have to enter the details relating to the payment, if applicable, and those of the supplementary return.Remember that the amounts are to be filled in euros and to two decimal places separated by a comma.Click on "Send Presentation" to finalise the presentation.