In order for you to start accepting e-invoices in our environment, you should first activate the acceptance of e-invoices.
From the menu, select Settings ->Invoice settings ->Purchase invoice settings and remove the tick from the setting "Don't accept purchase invoices in e-service:" and save.
After that, for companies registered in Estonia, it is necessary to confirm your choice of operator in the Business Register (www.rik.ee) within seven (7) days. A board member can do this very easily by entering the Business Register environment and confirming his service provider there.
More detailed instructions can be found on RIK's help page.