Introduction In the digital era of Polish tax administration, two terms are critical for compliant business operations: UPO (Urzędowe Poświadczenie Odbioru) and e-Deklaracje . While e-Deklaracje refers to the system of submitting tax and customs declarations electronically, UPO serves as legally binding proof that a submission has been successfully received by the relevant authority. Understanding both ensures legal certainty, avoids penalties, and streamlines administrative workflows.
Contact your local Tax Assistance Centre (KIS) or check the official e-Deklaracje portal at www.podatki.gov.pl . upo e deklaracje
