Thanks for getting in touch with the Community, meagan6.
Duplicate transactions can come from a user entering a record more than once, or from your online banking downloading records multiple times.
You can confirm what's causing them by utilizing the Audit log to see where their entries came from.
Here's how:
Use your Gear (⚙️) icon.
Click Audit log.
Hit the Filter drop-down list and choose All users.
Tick your Transactions checkbox.
Select Apply.
You'll be able to see where each record came from in the USER column. If they were downloaded through an online banking feed, you can exclude the duplicates from your Banking screen:
In the left navigation bar, go to Banking, then Banking.
Highlight your account by clicking it.
Access its For review tab.
Find the duplicate records and Exclude them.
If the duplicates were entered in your chart of accounts by a user, they can be deleted from the account's register. Before deleting any records from your chart of accounts, I'd recommend working with an accounting professional to properly determine how you should go about handling the transactions. If you're in need of one, there's an awesome tool on our website called Find an Accountant. All ProAdvisors listed there are QuickBooks-certified and able to provide helpful insights for driving your business's success.
I've also included a couple detailed resources about working with transactions which may come in handy moving forward: