The concept of trading is used to settle and reconcile inter comp transactions both sales and purchases, this is generally achieved by entering the comp id to which a customer belongs in the trading partner fields under the a/c control in the customer master record. You can do a similar entry in the vendor master record.
Trading partner T-codes
| Transaction Code | Description of T-code | Functional Area of T-code |
| OCCD | Customer: Maintain trading partner | FI - Basic Functions |
| MIGO | Goods Movement | MM - Inventory Management |
| OX15 | Define internal trading partner | FI - Basic Functions |
| MIRO | Enter Incoming Invoice | MM - Invoice Verification |
| MM01 | Create Material & | LO - Material Master |
| FERT | Flow of cost trace | FI - Financial Accounting |
| J1IEX | Incoming Excise Invoices | FI - Localization |
| VA01 | Create Sales Order | SD - Sales |
| FBL3N | G/L Account Line Items | FI - Information System |
| FB01 | Post Document | FI - Financial Accounting |
| FS00 | G/L acct master record maintenance | FI - Basic Functions |
| J1ID | Rate maint & amend open po's/so's | FI - Localization |
| F-02 | Enter G/L Account Posting | FI - Financial Accounting |
| FB50 | G/L Acct Pstg: Single Screen Trans. | FI - Financial Accounting |
| OBA7 | C FI maintain table T003 | FI - Basic Functions |
| ME21N | Create Purchase Order | MM - Purchasing |
| FV11 | Create condition | TR - Treasury |
| SE16 | Data Browser | BC - Workbench Utilities |
| SE38 | ABAP Editor | BC - ABAP Editor |
| XSLT | XSLT tester | BC - ABAP XML Processing |
| SM59 | RFC Destinations (Display/Maintain) | BC - RFC |
| VA02 | Change Sales Order | SD - Sales |
| VF01 | Create Billing Document | SD - Billing |
| OBYC | C FI Table T030 | FI - Basic Functions |
| SM30 | Call View Maintenance | BC - Table Maintenance Tool |
| XD01 | Create Customer (Centrally) | LO - Customer Master |
| SU01 | User Maintenance | BC - User and Authorization Management |
| OCRD | Number Range Maintenance: FCRP | FI - Payment Transactions |
| MM03 | Display Material & | LO - Material Master |
| FBL1N | Vendor Line Items | FI - Information System |
| PFCG | Role Maintenance | BC - ABAP Authorization and Role Management |
| FBL5N | Customer Line Items | FI - Information System |
| FB03 | Display Document | FI - Financial Accounting |
| XD02 | Change Customer (Centrally) | LO - Customer Master |
| FB02 | Change Document | FI - Financial Accounting |
| FAGLL03 | G/L Account Line Items (New) | FI - General Ledger Accounting |
| OB28 | C FI Maintain Table T001D | FI - Basic Functions |
| OMS2 | Maintain Material Types | LO - Material Master |
| COSS | Transport of C Tables | PP - Production Orders |
| J1IJ | Excise invoice selec. at depot sale | FI - Localization |
| SE37 | ABAP Function Modules | BC - Function Builder |
| BP | Maintain Business partner | AP - Dialog SAP-GUI |
| TBB1 | Execute postings | FIN - Transaction Manager |
| VOPA | Configuration: partner | SD - Basic Functions |
| OB32 | C FI Maintain Table TBAER | FI - Basic Functions |
| OBC4 | C FI Maintain Table T004V | FI - Basic Functions |
| OBYA | C FI Table T030 | FI - Basic Functions |
| FWER | Exercise Security Rights | FIN - Transaction Manager |
| WE20 | partner Profiles | BC - ALE Integration Technology |
| SU21 | Maintain Authorization Objects | BC - User and Authorization Management |
| SHD0 | Transaction and Screen Variants | BC - Transaction Variant and Table Control Settings |
| BD64 | Maintenance of Distribution Model | BC - ALE Integration Technology |