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Customer Master Data (Control Data) 
Definition
The part of the customer master record where you record general information about a customer.
To access the customer master, from the SAP Easy Access screen, choose Accounting ® Financial Accounting ® Accounts Receivable ® Master Records ® …
Use
Since companies in South Korea register with more than one district tax office for VAT purposes, create a separate master record for each of their VAT registrations. The customer master records contain a number of extra fields which allow you to store the VAT registration information about them that you have to include in the
VAT Summary Report and print on tax invoices.To customize the account groups so that these fields appear in the master records, maintain the field status for the Control Data tab, and set the Business Place field group to Req. Entry (Required Entry). You make these settings in Customizing for Financial Accounting (FI), by choosing Accounts Receivable and Accounts Payable ® Customer Accounts ® Master Records ® Preparations for Creating Customer Master Records.
When you maintain the customer master data, on the Control Data screen, fill out the fields as follows:
