If you've been using Commusoft and QuickBooks Desktop independently then you will have the same customers or suppliers in both systems.
The problem is that there is no link between these customer or vendor records and therefore when exporting data from Commusoft to QuickBooks Desktop, Commusoft will create a new customer or supplier record in QuickBooks Desktop.
To avoid this you need to 'tell Commusoft' that the customer or supplier already exists in QuickBooks Desktop. To do this you need to get the Third-party link code and tell Commusoft to associate the customer or vendor with this code.
Locating the Customer or Vendor Third-Party Link Code in QuickBooks Desktop
Go to Quickbooks Desktop > Customers or Vendors Centre > Double-click on the Customer or Vendor name > Copy field marked Customer or Vendor Name.
Link customers/suppliers
Go to Commusoft > Company settings > Integrations > Accounting interfaces > Quick links > Link customers and vendors > Paste the code from QuickBooks Desktop into the Accounting reference column.
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