How is Tax Calculation Date Derived in Customer Invoice

[SAPSupport]

When we checked under the customer invoice the Invoice Date under general tab and Tax date under Item tabs are different. 

Due to difference dates the exchange rates do not match

This system should have the tax date the same as the invoice date.

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[SAPSupport · Accepted solution]

Dear Customer, 

You can refer to the "KBA 2870164 - How is Tax Calculation Date Derived in Customer Invoice". 

For Customer Invoice, there are three ways to determine the Tax Calculation Date:

1. Material delivery based: The shipment date of Outbound Delivery is used as Tax calculation (Tax date in Items tab, Taxes sub tab).
2. Services:
   For a Service of Item Type SECO – Service - Time and Material, the Tax Date is taken over from the Tax Date of the Service Confirmation.
   For a Service of Item Type SEFL – Service Fixed - Price without actuals and SERV – Service - Fixed Price, the Tax Date is taken over from the Tax Date of the preceeding Sales Documents.
3. Manual Invoice: The invoice date is used for Tax calculation.
4. Scheduled Invoice Request: The invoice date in the invoice schedule of the contract or sales order is used for Tax calculation.

These dates are also used for the calculation of currency amounts.

Regards, 

Arjun T H