LodgeiT’s depreciation tool does not support SAP, assets cannot be migrated to SAP tax return too. But there is a workaround.
Set start and end date of tax return to regular period, migrate assets and reverse start and end date. The only downside is Opening value and Accumulated depreciation of assets may be migrated incorrectly. Make sure to check them and fix manually. After this the depreciation calculation will work correctly and also in next years after the tax return rollover.