Step 1:
Go to: https://www.altinn.no/en/
Step 2:
Log in with your D-number or Personal Identification Number via MinID or BankID
Step 3:
Click on “Inbox” then scroll down to, “skattetrekksmelding” or "bekreftelse på D-nummer"
Step 4:
Open the “Document” ➡️ Download this to a PDF-file
Step 5:
English: Upload a copy of the document to the Tax Card section in the app
This is how your tax card should looks like