Do you shop online from non-EU countries such as China, the US or Great Britain? From 1 July 2021 onwards, all parcels arriving from outside the EU must be declared, and VAT has to be paid for them.
The changes affect all goods arriving in Finland on or after 1 July, even if the order was made before July. If you order goods in June and they arrive in Finland in July, you must declare the parcel and pay the VAT.
More information at the Customs website: https://tulli.fi/en/everythingmustbedeclared