- Until the 1st: Annual information return of operations performed by business people or professionals belonging to the collection management system for payment by credit or debit cards; Annual information return of deposits, withdrawals from funds and collections from any document; Information return or organisations under the income allocation system; Annual information return on securities, insurance and income; Annual tax return for operations with third parties; Annual tax return on certain income obtained by individuals resident in other European Union member states or in other countries and territories with which data exchange has been agreed; Electricity tax; Hydrocarbon tax.
- From April 2nd to July 1st: Prepopulated income tax return 2012. You can do it through the web www.aeat.es or calling at 901 33 55 33 . Request and confirmation of prepopulated income tax return with refund amount, relinquishing the refund, negative amounts and amounts payable other than by direct debit.
- From April 24th to July 1st: Income and Wealth tax.
- Until the 22nd: Income and Corporation tax; VAT; Tax on insurance premiums; Manufacturing excise duties.
- Until the 30th: Tax identification number. Informative return on owned property and rights abroad.