How to apply for a refund of an undue payment
NOTE: The return of undue income corresponds to payments related to procedures of the Tax Agency. From AEAT no refunds can be made corresponding to payments related to organizations other than the Tax Agency.
The presentation requires identification with an electronic certificate, DNIe or Cl@ve of the declarant.
In addition to the owner of the declaration, it can also be presented by a third party acting on his or her behalf, whether a social collaborator or an agent to carry out the procedure.
Fill out the form by selecting the type of declaration: on your own behalf or on behalf of third parties (in this case it will be necessary to indicate the NIF of the interested party). Click on the "Add file" link to select the file with the documentation you wish to submit. In the "Help" link you can check the list of supported formats for submitting files for this procedure, with the maximum size allowed for each file being 64 MB.
Select or drag the file. It is preferable that the file name does not have punctuation marks and is saved on your local disk, within the " AEAT " folder.
The added file will appear in the "Attached Documentation" section.
When you finish attaching the files, press "Submit", check "Agree" and "Sign and send"