Company Formation in EU

I am looking to create a legal presence in the European Union with VAT and EORI numbers. I am looking for a cheaper option within the European Union. I would also need assistance with accounting and taxes within the European Union. I sell religious items like crosses, icons, books, and prayer ropes and would like to sell in Europe and ship using DHL from Germany. Anyone who has expertise in accounting and company formation in Poland, Estonia, Latvia, Romania would be helpful. I would need help with filing taxes for the business.