Union-OSS VAT filing (step 3) | EU VAT compliance guide

Submitting the OSS report and paying the VAT is done through the national tax office portal where you find your other taxation details and do the Union-OSS VAT filling and registration. 

The report and payment have to be filed one month after the end of the tax term, which in the case of Union-OSS VAT filing is quarterly. Your report and payment should be made by the end of April, July, October, and January. EAS report is ready for filing on the first day of the new tax term. You do not have to pay the due VATs simultaneously, they can be paid on the last day. The national tax offices then distribute the payments to appropriate countries.

If you have a fiscal representative, filing is done by them instead of you, the merchant. Make sure the data they receive is factual and correct, they will most certainly charge you for any extra work. EAS report is ready for provision to the fiscal representative.

A single OSS report contains all EU countries, you do not have to prepare a separate report for each country. The only effort you have to be mindful of is that you have to file the OSS report even if there are no Union-OSS sales. Not filing the report / continuous mistakes with the report will result in removal from OSS and potential fines.