QuickBooks Online: Duplicate Document Number Error 

Problem

Duplicate Document Number Error: You must specify a different number. This number has already been used. 

Resolution

Invoice numbers in QuickBooks have to be unique, make sure that there is no other invoice in QuickBooks that already has the same invoice number which you are trying to export from BMS. 

Was this article helpful?
0 out of 0 found this helpful
Have more questions? Contact us