I have allocated payments to some invoices in error, how do I remove all history of these payments?

Hello mocp-hotmail-co-!

I can help you with the payment transaction.

You can simply delete the payment. Open the payment transaction, click More at the footer section, and select Delete. Then on the pop, click Yes to confirm.

I added this link if you need help in reconciliation: Learn the reconcile workflow in QuickBooks. This includes articles on how to fix issues and reviewing reconciliation reports.

The Community is always here to help you if you have other concerns. Take care!