3441490 - Error message "Tax entry not possible in this item(FF724)" appears when creating supplier invoice

The error message Tax entry not possible in this item(FF724) appears when creating supplier invoice.

SAP S/4HANA Cloud

• Open App Create Supplier Invoice.
• Enter the required data (Date, Reference, etc).
• Click into "Simulate".
• This error message comes up. 

In case of APP Create Supplier Invoice or App Create Supplier Invoice - Advanced, if a user enters the tax amount manually during document creation, the system makes a cross-check against calculated tax for the given base amount. Deviations of the price could be tolerated (depending on the scenario) and the manually input tax would prevail.

There is one exception though, if the calculated tax amount is zero, then the system will not accept a non-zero manual amount and will raise the mentioned error.

This is the standard behavior of the system.

If it is necessary to manually input tax amount, please use a different tax code (not zero).

Tax entry, FF724, Create Supplier Invoice, F0859, Create Supplier Invoice - Advanced, MIRO, tax code, tax rate , KBA , FI-GL-GL-F-2CL , Value Added Tax (VAT) (Public Cloud) , MM-IV-INT-TAX , Tax , Problem