QB Issue Resolution:

Is the SR made out correctly, the same as the invoice?

Then you can just make a Credit Memo for the customer now, for the same as the invoice, and then in Receive Payments, apply that credit to the open invoice, and that should remove the balance for that customer.

Resolution for Issue 'How to delete a sales receipt and enter as received payement instead?' available: Yes (Solved).
Source: Intuit Community forum.

How to delete a sales receipt and enter as received payement instead?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Invoice
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Error Recovery for Invoice [Canada]
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