Income Tax

- The income tax declaration is done for the previous year. It's done online here: https://sede.agenciatributaria.gob.es/static_files/en_gb/common/html/selector_acceso/SelectorAccesos.html?rep=S&ref=%2Fwlpl%2FDASR-CORE%2FAccesoDR2024RVlt&aut=CPRE

- Tutorial: https://sede.agenciatributaria.gob.es/Sede/en_gb/ayuda/consultas-informaticas/renta-ayuda-tecnica/renta-web-open.html

- If you've earned less than 22,000 euro from one single Spanish payer, it isn't mandatory; only do it if you're entitled to a refund

- You can do a mock declaration here: https://sede.agenciatributaria.gob.es/Sede/procedimientoini/ZZ08.shtml

- You can also get an appointment at "Hacienda" and have the taxes done for you