QB Issue Resolution:

pen a sales order, after turning them on in preferences if you need to, Menu Edit>Preferences>Sales>Company tab check mark sales orders are active

click the formatting tab, click customize data layout

change the name of the sales order to Pro Forma Invoice and make what other changes you need

use that template. sales orders (pro forma invoice in this case) do not post to the accounts, when ready make your final edits to the sales order and convert to an invoice

any invoice template you use, no matter what you call it, posts to the accounting

Resolution for Issue 'I am a CPA that invoices is time. Is it possible to create a pro-forma invoice, edit it, and then finalize? Deleting an invoice doesn’t change billed status of time.' available: Yes (Solved).
Source: Intuit Community forum.

I am a CPA that invoices is time. Is it possible to create a pro-forma invoice, edit it, and then finalize? Deleting an invoice doesn’t change billed status of time.: 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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