How to remove payment on invoice marked as paid, on quick books self employed?

Hello there.

I'd be glad to assist you with handling an invoice that has been accidentally marked as paid in QuickBooks Self-Employed (QBSE).

In QBSE, once an invoice is marked as paid, there isn't a way to undo it. Thus, you'll need to delete the invoice and recreate it.

Here's how:

1. Sign in to your QuickBooks Self-Employed account.
2. Go to the Invoices menu.
3. From there, locate the specific invoices you want to delete.
4. Click on the drop-down arrow under the ACTION column.
5. Then, select Delete.

For more information, you can visit this article: Create invoices in QuickBooks Self-Employed.

Furthermore, If you need help managing sales taxes in QBSE for the products and services you sell, you can refer to this helpful article for future help: Manually track sales tax in QuickBooks Self-Employed. 

If there's anything else you need help with managing your invoices don't hesitate to reach out. Stay safe.