After data migration to online Quickbooks, I now have double entry paid invoices. Is it OK to delete the duplicates?

It's a pleasure to have you in the Community. I'd be delighted to assist you with deleting an invoice in case of duplicates, @katie84.

If you encounter a duplicate invoice in QuickBooks Online after the migration, you have the option of deleting it. Take note also that when you delete a transaction in QuickBooks, the transaction is completely erased from your books, and it won’t appear on any reports or in any accounts. 

To proceed, here's how:

1. Open your QuickBooks Online account.
2. Find and open the invoice you want to delete. 
3. Choose More at the bottom of the screen and click Delete.
4. Click Yes to confirm that you'd like to remove the transaction. 
   
   

For additional information, you may also check out this article: Void or Delete an Invoice or Other Transactions.

Just in case you want to review open invoices and record invoice payments, I suggest utilizing these links:

• Manage invoices in QuickBooks Online.
• How to record invoice payments manually.

That's should get you back on track! If you have further questions handling your invoices, feel free to comment down below. I'll be happy to assist you again.

Hi, @katie84.

Hope you’re doing great. I wanted to see how everything is going about the invoice concern you had the other day. Was it resolved? Do you need any additional help or clarification? If you do, just let me know. I’d be happy to help you at any time.

Looking forward to your reply. Have a pleasant day ahead!