I saw a flag checked in Display Document : Offsetting item window. Below is the F1 help of it. But still I didnot get the concept of this flag.
Item Created by Posting Interface
Use
Indicates that the G/L item is generated in the posting interface for Contract Accounts Receivable/Payable (FI-CA).
This indicator is required internally by the system in order to be able to execute all the activities necessary for resetting cleared items.
Examples
The following items posted during clearing carry this indicator:
Cash discount deductions
Other deductions within tolerances
Exchange rate differences
Tax adjustments
Also the field next to this flag contains one value and that field has below F1-help
Transaction key for account determination
Defines the type of automatic posting in question. These keys are defined in the system and cannot be changed.
Use
The transaction key documents the type of tax following transfer to General Ledger Accounting (FI-GL).
The transaction key is used by the system to determine the tax accounts to be posted to automatically.
Examples
MWS is used for output tax.
VST is used for input tax.
RDW is used for rounding amounts when clearing in an alternative currency.
BVR (formerly BUV) is used for company code clearing.
SKT is used for cash discounts.
