SAP Function Module search on KR_U
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KR_UPDATE_CUSTVEN_VATNO - Update task for customer and vendor
KR_USER_EXIT_BUSINESSPLACE - User exit for determining customer business places
KR_USER_EXIT_CANCEL_TAXINVOICE - Track Canceled Tax Invoices
KR_USER_EXIT_COPY_TAXINVOICE - Copy Tax Invoice Numbers to Any Field in BSID
KR_USER_EXIT_INTERBUPLA - User exit for non migrated interbusiness place documents
KR_USER_EXIT_LIST_TAXINVOICE - Enchance Output List
KR_USER_EXIT_ROUNDOFF - Round Off Tax Amounts
KR_USER_EXIT_TAX_CODE - Validate Selection Screen Inputs
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