If an employee still works for us, there won’t be any issue when it comes to retroactively changing their tax bracket provided the employee has also made the change in their portal.
In the event that the employee no longer works for us and retroactively wants their pay calculated with tax bracket I, we will require a letter from the tax office to verify that tax bracket I is available to the employee during the period in question.
In the event that the employee no longer works for us and retroactively wants their pay calculated with tax bracket VI, they will retroactively need to transfer all payable deductions before the tax bracket can be updated.
The tax year ends with the issuance of the December payslip and after this point, any changes to the tax bracket applied in the previous year are no longer possible.