QB Issue Resolution:

This is easily done for you in QBD.  Pull down the Customers menu and you will see “Assess Finance Charges”. First it will have you set up the criteria such as rate and grace days, etc.  Then will open a window for you to assess the charges.  It’s pretty cut and dried once you get in there.

Resolution for Issue 'How to set up finance charges or late fees on open invoices' available: Yes (Solved).
Source: Intuit Community forum.

How to set up finance charges or late fees on open invoices: 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 Customers menu
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Error Recovery for Customers menu [Canada]
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