3789107 - Invoice Tax Added At Invoicing With Foreign Currency Conversion Causes Discrepancies Versus Tax-Free Purchase Order — SAP S/4HANA Cloud Public Edition

• The purchase order is created without tax, but tax is later added during supplier invoicing based on a USD exchange rate.
• During invoice verification, the tax amount is converted to RMB at the exchange rate when the tax is paid, creating discrepancies.
• The contract amount is fixed; adjustments at invoicing cause issues in raw materials (inventory) and accounts payable.
• Repeated subsequent debit/credit postings are used to reach a final tax amount.
• No specific error message is shown.

• Product: SAP S/4HANA Cloud Public Edition
• Logistics Invoice Verification (Public Cloud)

1. Log in to the quality (Q) system.
2. Create a purchase order without tax.
3. Create a supplier invoice and add tax based on the USD exchange rate.
4. Verify the invoice and observe discrepancies after the system converts tax to RMB at payment-time exchange rate.

• The system recalculates tax as a percentage of the net amount and translates it at the invoice’s exchange rate; manually typed tax figures are typically replaced on simulate/post.
• The invoice total (gross) is a calculated field and cannot be used to force a tax figure.
• Repeated small invoices and manual journal postings routed via the PO disturb GR/IR clearing, inventory valuation, and accounts payable balances.

1. Run a quick test: open a supplier invoice, switch off automatic tax calculation, enter the fixed tax figure, and click Simulate (do not post) to confirm whether the system keeps or replaces the typed amount.
2. If the system recalculates and replaces your typed value, post the supplier invoice tax-free to match the purchase order (no percentage tax code at invoicing).
3. Post the fixed tax amount as a separate financial journal entry (debit the tax account, credit accounts payable). Confirm with finance that the tax account permits manual entry. This posting is not linked to the PO and will not impact GR/IR or inventory.
4. Set a fixed exchange rate on the purchase order to avoid retranslation differences at invoicing.
5. If the test shows your typed tax is retained, you may enter the fixed tax directly on the invoice. Pilot on a small sample and validate tax return figures before broad use.
6. If a native fixed-amount tax entry is required, raise a feature request through the official channel.

• refer to: 3766626 - Tax Calculation Imbalance After Editing Header Gross Amount
• refer to: 2976186 - Rounding of gross amount on supplier invoices
• refer to: 2838428 - How to Submit Feature Requests for Procurement

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