Hi KR54, thanks for posting on the Community
The most common cause behind duplicate sales is when transactions are added from the bank feed instead of matched (when the sale has already been recorded in QuickBooks).
For example, if you have an invoice and mark this as paid in QuickBooks (by selecting Receive payment), the downloaded bank payment should then be matched to this. This links the transactions together so you don't get duplicates.
You can correct this by re-reviewing the transactions in the bank feed. To do this, navigate to Transactions > Banking > Categorised > Tick the transactions that apply > Scroll to the top and select Undo. This moves the transactions back to the For review tab where you can select Match (or Find match if no auto-match is found).
Please note that it's only possible to match to transactions that have not yet been reconciled in QuickBooks. If you've already reconciled, exclude the transactions from the bank feed instead.
If you need any further help on this, get back to us below!
