Pre303 reads the ledgers and does not file
Pre303 is the Tax Agency tool that helps fill in modelo 303 from VAT ledger spreadsheets. Pre130 plays a similar role for the payment on account. Neither of them files the self-assessment.
A helper that reads ledgers
Pre303 can take a ledger spreadsheet and help you carry figures onto the form. It is not the submission form. The ISO-8859-1 text file, the one for Import on the form itself, is a different file.
- Pre303: a helper that reads VAT ledgers.
- Pre130: the matching helper for modelo 130.
- Neither file files the form.
The app’s XLSX is the ledger
The XLSX Factura Fácil generates is the ledger for that tool. How it differs from the Import file is in Pre303 and the BOE file. Neither one files the self-assessment.
Common questions
Does Pre303 file modelo 303?
No. It is a helper for reading the ledgers and filling in. Filing is the submission on the site, with a certificate or Cl@ve.
Is the app’s spreadsheet the BOE file?
No. The XLSX is the ledger for Pre303 and Pre130. The BOE file is the ISO-8859-1 text for Import. Neither files the form.
Official sources
Informational text reviewed on 26 September 2026. It is not tax advice and does not replace the Spanish Tax Agency or your accountant. Deadlines, rates, and forms can change.