Polish taxation system consists of several types of taxes (e.g. PIT, CIT, VAT, etc.).
In general, everyone working in Poland (usually it means a stay of at least 183 days of the calendar year) is a taxpayer here and is liable on their globally-earned income regardless of the place from where remuneration is received. In case of temporary residence, only the income coming from the Polish sources, irrespective of where it is received, is subject to taxation in Poland. The detailed regulation is included in international agreements for the avoidance of double taxation signed by Poland with over 80 countries.
Each year between February and 30 April, all employees who worked in Poland in the previous year, have to submit their annual Personal Income Tax declarations (PIT) to the taxauthorities. There are various PIT forms marked with different numbers but the most common form is PIT-37 for employees not running their own business.
In order to submit your tax declaration, first before the end of February your employer has to provide you with the PIT-11 form which includes information on paid taxes.
The annual tax declaration can be submitted to the tax authorities in a few ways (online and in person).
WORD OF ADVICE
It is essential to remember about making payments and submitting tax declarations within due time, as the legislator imposes fines on tax evasion.
For detailed information concerning taxes in Poland please visit the Euraxess website.