Understand this route
Tax route for “Choose an annual PIT route”: first identify the tax year, documents and official action that fits your situation.
What to do
- Use the return selector only after classifying income, payer documents, foreign income and the tax year.
- PIT-37 is commonly relevant to Polish payer income; self-calculated, foreign or other income can require a different form or verification. Do not treat this route as a calculation.