The German tax year follows the calendar year and runs from January to December.

• Mandatory tax declaration: You have to submit your tax declaration between January 1st and July 31st of the following year. You can apply for an extension once with the local tax office (Finanzamt).
• Voluntary tax declaration: You can hand in your tax declaration and apply for refunds up to four years.
• Through a tax advisor or Lohnsteuerhilfeverein: The deadline is the end of February of the following year.

Credit: Content by Anshul Srivastava
DISCLAIMER: The information provided here is for general informational purposes only and does not constitute professional tax, legal, or financial advice. I am not a licensed tax consultant under German law. For tailored advice specific to your situation, please contact a certified Steuerberater or tax advisor.