KCS - Quickbooks Error Code 6140


  • Error Code 


  • Clio Web App 
  • Quickbooks Web App 

Additional Information:



This indicates that a either a Bill, a Bill Payment, an Interest charge, or maybe something else has not been synced because the QBO Document Number that Clio is trying to use has already been used by Quickbooks. There are cases where a duplicate number doesn't exist in Quickbooks, but the invoice number is still not accepted by Quickbooks. 


  1. Select Settings
  2. Select Bill Syncing 
  3. Locate the Error Code by scrolling down 
  4. Select Re-sync 

If the above steps don't correct the issue. Modify the invoice number first, and than complete the steps listed above. To edit the invoice number, complete the following steps: 

  1. Open the Invoice 
  2. If there are any payments, select Delete in the top right hand side of the screen 
  3. Select Edit 
  4. Update the invoice number by retyping a higher number in the ID# field 
  5. Select Save invoice 



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