You may experience that the tax credit (heffingskorting) is not included in the tax calculation on the send page of a 2025 income tax return if actual return is applied to Box 3 and the Box 3 assets are fully allocated to the partner. On the declarant's send page, you will see the tax credit (heffingskorting) listed under tax credits, but the total count is set to 0. Subsequently, in the declarant's tax calculation, you will see that the tax credit is not included in the calculation. If you allocate a part of the Box 3 assets to the declarant, the calculation will be correct.
We are investigating this issue, and we will update this page as soon as more information becomes available. Our apologies for the inconvenience.