You use automatic rounding to have amounts rounded according to a method you specify. To use automatic invoice rounding, you must set up one or more G/L accounts for rounding differences and then enter the account number or numbers on all customer and vendor posting groups.
Open the Customer Posting Groups window.
Click the Invoice Rounding Account field on the first posting group. Enter the relevant G/L account number.
Repeat this procedure for each customer posting group.
Click Purchases & Payables, Setup, Vendor Posting Groups.
Insert the G/L account number on each vendor posting group, following the above procedure.
Setting Up Rounding Rules for Local Currency
Setting Up Rounding Rules for Foreign Currency
Activating the Invoice Rounding Function