GR/IR tolerance for automatic clearing

All you have to do is define a tolerance limit (Group) and assign it to the user.
The group must be assigned to the particular GL Account through its master data. In this case, you need to have accounts where clearing differences (loss or gain) will go.
Check the following t-codes: OBA0, OB57 and OBXZ
IMG > FA > GLA > Business Trn > Opn Itm clrg > Clrg differences

1. Define tolerance for GL Account (This tolerance to be assigned to that GL account)
2. Assign Users to Tolerance Groups
3. Create Accounts for Clearing Differences