You need to remember that in Poland the final amount of duty depands on an Officer of a Customs Office.

You can check duty rates in Isztar – Customs Service of the Republic of Poland System ISZTAR – Tariff Information

You can find basic information about importing goods to Poland – Ministry of finance basic information

Here you ou can find basic information about Economic Operators’ Registration and Identification – EORI

UPS restrictions – List of prohibited articles