QB Issue Resolution:

They only way to do that would be open a new invoice, add that item, memorize it

then every time you invoice you first go to recurring transactions, find the invoice in the listing, and select use transaction

not worth the added steps in my opinion

Resolution for Issue 'I would like to have an automatic charge for shop supply’s on open invoices how can I do that' available: Yes (Solved).
Source: Intuit Community forum.

I would like to have an automatic charge for shop supply’s on open invoices how can I do that: 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.

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