What time limits apply to the relief amount for single parents?

According to the Income Tax Act, there is a legal obligation to change tax class II if the stated requirements cease to apply in the current tax year. If the child is registered several times, this also applies if the child benefit is paid to the other parent in future. To notify the tax office of the discontinuation of tax class II, you can use the application for income tax reduction and for income tax deduction features 2025 - main form and tax class change attachment (line 33). For each month in which the requirements were not met, the relief amount is reduced by one twelfth.

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