Before you can use the automatic invoice rounding function, you must set up rounding rules.
Open the General Ledger Setup window.
On the Application tab, fill in the Amount Rounding Precision, Unit-Amount Rounding Precision, Inv. Rounding Precision (LCY) and Invoice Rounding Type (LCY) fields. (The first two fields are not included in the standard layout, but they can be inserted with the Design facilities.) For Help about a specific field, click the field and press F1.
Specifying G/L Rounding Accounts for Posting Groups
Setting Up Rounding Rules for Foreign Currency
Activating the Invoice Rounding Function
Setting Up G/L Accounts for Rounding Differences