To create an A/P correction invoice with reference to a base document, proceed as follows:
From the SAP Business One Main Menu, choose
.Specify the vendor.
Choose Copy From and select the base document you want to reference.
SAP Business One copies the base document data into the A/P correction invoice.
Correct the relevant data (quantity, price, tax group, and so on) in the SHOULD BE section.
Choose Add.
SAP Business One performs all relevant posting to:
Business Partners
Business Partner Reconciliation Account
Tax Account
Clearing Account
Inventory Account
Price Differences Account
Warehouse
SAP Business One automatically calculates, compares to the base document, and posts only the differences.