Portuguese established companies and non-EU sellers opting to use its Portuguese VAT identification number, can now pre-register to the new One Stop Shop regime in this link of the Portuguese tax portal.
To put it simply, the One Stop Shop will go live on 1.07.2021 and allows companies to file and pay the VAT due for their EU distance sales (internet sales to private customers) and TBE services (telecommunications, broadcasting & electronic services) from one single Member State.
Companies currently operating under MOSS will automatically transit to the OSS. In case there are differences between the current and future status, companies can update their records in the same link until 30.06.2021.
You can read more about the new distance sales regime here VAT-Distance-Sales-2021.pdf (belim.pt). You can find the information issued yesterday by the Tax Authorities on the OSS register here Circular Ruling 30233.Request Info