3830913 - Supplier invoice API consolidates multiple tax lines with same tax code into one line in OA integration, SAP S/4HANA Cloud Public Edition

• Integration with OA results in three lines of tax details entered in OA, but after transmission they are consolidated into one line in the system.
• Finance cannot reconcile tax details because multiple tax lines become a single consolidated line.
• No error message is displayed.

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

1. Integrate with OA for supplier invoice posting.
2. Enter three separate tax detail lines in OA.
3. Transmit the invoice payload to the supplier invoice API.
4. Observe that the system consolidates the multiple tax lines into one line.

• Standard behavior: The supplier invoice API uses a header-level tax summary keyed by Tax Code. Multiple header tax entries with the same Tax Code are consolidated into a single tax line.

1. In the OA or middleware layer, group all tax lines by Tax Code before calling the supplier invoice API.
2. Sum the Tax Amount per unique Tax Code.
3. Send exactly one header tax entry per unique Tax Code in the API payload.
4. If detailed tax-line granularity is needed for reconciliation, retain and report that detail on the OA side; it will not be preserved in the system by design.
5. Note that there is no configuration or API parameter in SAP S/4HANA Cloud Public Edition to disable or prevent this consolidation.

• Refer to: Supplier Invoice API – Use Case (tax handling)
• Refer to: Supplier Invoice API – Request Example
• Refer to: Supplier Invoice OData V2 API Overview
• Refer to: KBA 3749186 – Multiple entries in header tax for same tax information not supported
• Refer to: KBA 3556973 – Assign two tax codes for a supplier invoice line item
• Refer to: KBA 3707181 – Single tax code per supplier invoice line item in S/4HANA Cloud Public Edition
• Refer to: KBA 3730198 – Error “Multiple entries in headertax for same tax information are not supported”

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