Spanish tax return deadlines
Quarterly IVA return/ income tax return			1st-20th April
			1st-20th July
			1st-20th Oct
			1st-31st Jan
Quarterly retentions returns			1st-20th April
			1st-20th July
			1st-20th Oct
			1st-20th Jan
Annual IVA summary,			31st Jan
Annual retentions summary
Company tax payment on account			1-20 April
			1-20 Oct
			1-20 Dec
Residents income tax return			2nd May (approx) - 30th Jun
Non-residents income tax return			31st December
Annual company tax return			6 months and 25 days from end of accounting period