How to Change Cost Center in Accounting Document

Changing the KOSTL (Cost Center) field in the BSEG table using a BAPI is not directly possible since BSEG is a line-item table and is managed by SAP standard transactions. The BSEG table is updated indirectly through various financial postings and cannot be directly modified using a standard BAPI.

Alternative Approach:

If you need to change the cost center in financial documents, the correct approach would involve reversing the original document and posting a new document with the correct cost center. However, if your goal is to correct or change the cost center without reversing and reposting the document, consider using the following methods:

1. Use BAPI for Document Reversal and Reposting

• BAPI_ACC_DOCUMENT_REV_POST: This BAPI is used to reverse the original accounting document.
• BAPI_ACC_DOCUMENT_POST: This BAPI allows you to repost the document with the correct cost center.

2. Use a Direct Update via a Custom ABAP Program (Not Recommended)

• Directly updating the BSEG-KOSTL field is not advisable since it can lead to inconsistencies in the database and violates SAP’s data integrity principles.

3. Use Special Purpose BAPIs

• In specific cases, you may use specialized BAPIs related to the type of posting, such as:
  • BAPI_ACC_GL_POSTING_REV_POST: If dealing with General Ledger documents.
  • BAPI_ACC_INVOICE_RECEIPT_POST: For invoices and vendor-related postings.

Conclusion

Direct modification of BSEG-KOSTL via a standard BAPI is not supported. The best approach involves reversing the original document and posting a corrected version using standard BAPIs, ensuring that data integrity is maintained within the SAP system.