QB Issue Resolution:

The reason why you’re unable to change your customer information upon receiving payment is that the payment is not recognized by the system because it belongs to another customer. Therefore, you’ll need to edit the name of the customer on your Merchant Service deposit window so that the payment will be recognized and can be matched in QuickBooks Desktop.

Please see the screenshot attached for your reference.

That should guide you in changing your customers’ information successfully, camajesticpool.

Resolution for Issue 'How can I change/update the customer information on a payment received via quickbooks online, that has already been downloaded onto QuickBooks desktop?' available: Yes (Solved).
Source: Intuit Community forum.

How can I change/update the customer information on a payment received via quickbooks online, that has already been downloaded onto QuickBooks desktop?: 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 merchant service
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Error Recovery for merchant service [Canada]
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