How to fill in the tax return for sole proprietorships Share Print Thanks! Tell more friends Thanks! Try again Tell a friend Tell a friend Recipient's e-mail Your e-mail Share with: LinkedIn Twitter Facebook 1 Start 2 What you must do first 3 Log in to Altinn 4 Essential information about the tax return and attachments 5 Enter information about your sole proprietorship 6 Fill in attachments 7 Submit the tax return for sole proprietorships with attachments 8 What will happen after you have submitted Log in to Altinn Log in to Altinn here (opens in a new window). Adjust the browser windows so that you can see both Altinn and skatteetaten.no. You will find the Help for log-in at the bottom of the Altinn page. Then select the tax return in “My message box”. ForrigeNeste Did you find what you were looking for? Thank you for your feedback Yes No Vennligst velg en vurdering What were you looking for? Maks 255 tegn. Kun tall og bokstaver.