The following table lists the mappings of SAP fields to Global Tax Determination (GTD) custom fields in the RFC_CALCULATE_TAXES_DOC:
| RFC Field | GTD Request Field | Notes |
| ENTITY_USE | LnItm.myEndUseCd | |
| LOC_CODE | LnItm.shipFrom | Takes precedence over TXJCD_SF. |
| TXJCD_LSP | LnItm.LSP | Takes precedence over TXJCD_ST. |
| TXJCD_LOU | LnItm.LU | Takes precedence over TXJCD_ST. |
| TXJCD_BT | LnItm.billTo | Takes precedence over TXJCD_ST. |
| GL_ACCNT | LnItm.CustAttrb | GL_ACCOUNT_NUMBER |
| SLS_OFFICE | LnItm.CustAttrb | SALES OFFICE |
| SLS_GRP | LnItm.CustAttrb | SALES GROUP |
| COST_CENTER | LnItm.CustAttrb | COST_CENTER |
| MAT_GRP | LnItm.CustAttrb | MATERIAL GROUP |
| CUST_GRP | LnItm.CustAttrb | CUSTOMER GROUP |
| CLNT_REG_NO | LnItm.myRegNm.code | |
| CLNT_STAT | LnItm.myRegNm.status | |
| CUST_REG_NO | LnItm.custVendRegNm.code | |
| CUST_STAT | LnItm.custVendRegNm.status | |
| VNDR_REG_NO | LnItm.custVendRegNm.code | |
| VNDR_STAT | LnItm.custVendRegNm.status | |
| DEL_INS | LnItm.dlvrInsAmt | |
| CUSTOM_DUTY_AMOUNT | LnItm.custmsDutTrfAmt | |
| DISCOUNT_TYP | LnItm.discnt.tp | |
| DISCOUNT_AMOUNT | LnItm.discnt.amt | |
| MODE_TRANSPORT | LnItm.myMTCd | |
| DELV_TERM | LnItm.myDlvrCd | |
| WEIGHT_UOM | LnItm.wgtUMCd | |
| ITEM_WEIGHT | LnItm.ItmWgt | |
| TT_DATE | LnItm.titleTrnsDt | |
| ACCNT_DATE | N/A | |
| PYMNT_DUE_DATE | LnItm.pmtDueDt | |
| PYMNT_RECVD_DATE | LnItm.pmtDueDt | |
| SERV_PERF_DATE | LnItm.srvcPerfDt | |
| CNTRCT_END_DATE | LnItm.contrctEndDt | |
| CNTRCT_STRT_DATE | LnItm.contrctStartDT | |
| TRNS_DOC_DATE | Doc.docDt | |
| CNTRY_ORIGIN | LnItm.cntryOfOrign | |
| REG_OF_ORIGIN | LnItm.regOrignDestCd | |
| NAT_OF_TRNS | LnItm.natureOfTrn | |
| LOAD_PNT | LnItm.portLoadUnload | |
| ORG_DOC_NUM | LnItm.origDocNm | |
| ORG_TRNS_DATE | LnItm.origTrnDt | |
| CNTRCT_NMBR | N/A | |
| CNTRCT_AMNT | N/A | |
| AUDIT_UPD | Doc.CustAttrb | AUDIT_UPD |
| DROP_SHIP_IND | LnItm.dropShipInd | |
| CF_BYPASS | N/A | This field should have the value X when executing central finance scenarios. |