Why can't I retrieve the tax deduction card/tax exemption card of an employee?

You will be notified if the employee has not been issued with a tax deduction card. The employee must apply for a tax deduction card/tax exemption card. You will be notified of the revised tax deduction card when the tax card/exemption card is ready to be retrieved.

Have you been given a tax exemption card amount NOK 0? See How do I obtain tax exemption cards?