Link Between SAP SD, MM & FI

The link between SD and MM :-

1. When you create sales order in SD, all the details of the items are copied from Material master of MM.
2. MRP and availibility check related data is also taken from MM although you control this data in SD also.
3.  While you create inbound/outbound delivery with reference to a sales order,the shipping point determination takes place with the help of the loading group, plant data, shipping conditions etc. This also refers to Material Master.
4.  The material which you are entering in a sales order must be extended to the sales area of your sales order/customer otherwise you cannot transact with this material.

There are many such links between SD and MM.

Now the link between SD and FI :-

1. Whenever you create a delivery with reference to a sales order, goods movement takes place in the bacgground. eg. In case of standard sales order, you create an outbound goods delivery to the customer. 

Here movement 601 takes place. This movement is configured in MM. Also, this movement hits some G/L account in FI. Every such movement of good s hits some G/L account.

2. The accounts posting in FI is done with reference to the billing documents (invoice, debit note, credit note etc) created in SD. Thus this is a link between SD and FI

3. Tax determination: In case of a tax determination also, there is a direct link between SD and MM

SD Integration points with other modules

SD module is highly integrated with the other modules in SAP.

Sales Order – 

Integration Points                      Module

•Availability Check             -       MM

•Credit Check                   -       FI

•Costing                        -       CO/ MM

•Tax Determination              -       FI

•Transfer of Requirements       -       PP/ MM

Delivery & Goods Issue – 

Integration Points                      Module

•Availability Check             -       MM

•Credit Check                   -       FI

•Reduces stock                  -       MM

•Reduces Inventory $            -       FI/ CO

•Requirement Eliminated         -       PP/ MM

Billing -

Integration Points                      Module

•Debit A/R                      -       FI/ CO

•Credit Revenue                 -       FI/ CO

•Updates G/ L                   -       FI/ CO

  (Tax, discounts, surcharges, etc.)

•Milestone Billing              -       PS

Return Delivery & Credit Memo -

Integration Points                      Module

•Increases Inventory            -       MM

•Updates G/ L                   -       FI

•Credit Memo                    -       FI

•Adjustment to A/R              -       FI

•Reduces Revenue                -       FI

SD Transaction Code Flow: 

Inquiry / Document type IN 

Tcode for creation VA11,VA12,VA13. tables VBAK,VBAP

Quotation / QT 

Tcode for creation VA21,VA22,VA23. tables VBAK,VBAP

Purchase Order PO 

Tcode for creation ME21,ME22,ME23. tables EKKO,EKPO.

Sales Order OR 

Tcode for creation VA01,VA02,VA03. tables VBAK,VBAP

Delivery LF 

Tcode for creation VL01,VL02,VL03. tables LIKP,LIPS

Billing MN 

Tcode for creation VF01,VF02,VF03. tables VBRK,VBRP