If your going to keep the money. It’s income. Create an invoice for the overpayment & apply the overpayment to the invoice. Otherwise, refund the money to your customer.

Resolution for 'couple dollars issue: 'Customer overpayment for a couple dollars' available: Yes.

The couple dollars 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 couple dollars issue yourself by looking for a resolution described in the article. If it is a complex couple dollars issue or you are unable to solve the issue, you may contact us by clicking here or by using other couple dollars support options.

For more information about resolving issues related to couple dollars in Quickbooks/QBO or to get support for the issue 'Customer overpayment for a couple dollars', click the link below: