Not 100% sure, but I think it's related to your home address in Poland (So for example Urzad Skarbowy Krzyki is for all addresses belonging to the Krzyki district)
So you should go to Urzad Skarbowy in Poznan. Only your current address is important for them. For tax purposes only place of residence matters - ie. the place where the taxpayer resides with the intention of permanent residence.