I accidentally marked an invoice as paid. how can i reverse that, or should i delete and send a new one?

Hi gabby-gabbyrosi-!

Welcome to QuickBooks Community. I can show you how to mark the invoice unpaid in QuickBooks Self-Employed.

Please follow these steps on how to mark it unpaid:

1. Go to the Invoices menu and select Invoices tab.
2. Locate the invoice.
3. Under the Action column, click the drop-down arrow next to View and select Mark as unpaid.

Also, I added this link if you need help in sending your data to TurboTax for tax filing: Send QuickBooks Self-Employed tax info to TurboTax Self-Employed or Live.

Let me know if you need more help with invoices by commenting below. Take care always!