QB Issue Resolution:

Billable expenses must be added to an Invoice – then you can receive payment on the invoice. There is no way to add billable expenses to a sales receipt

Resolution for Issue 'How do I apply a billable expense to a sales receipt?' available: Yes (Solved).
Source: Intuit Community forum.

How do I apply a billable expense to a sales receipt?: 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 billable expenses
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Error Recovery for billable expenses [Canada]
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