Please help. I need to populate these:
1. Document Header Text BKPF-BKTXT should be populated with the Customer Check Number
2. Document Reference field BKPF-XBLNR should be populated with the Lockbox No.
Please tell me where , in which TCode the check number and Lockbox number is entered into SAP. So that I can locate for any user exit in that TCODE and write my logic to populate it with the entered Check number and Lockbox number.