“But I since have a balance from bills that were paid by means of joint checks.”

Meaning, you did not even have to pay that, so it is not something you incurred.

“(Our Customer made a joint check we signed and sent it to our Vendor.) That income was not entered into […]

Resolution for 'Account Payable balance issue: 'How to clear Account Payable balance' available: Yes.

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

For more information about resolving issues related to Account Payable balance in Quickbooks/QBO or to get support for the issue 'How to clear Account Payable balance', click the link below: