QB Issue Resolution:

I’d be happy to show you how to turn this feature off.

Please follow these steps:

Go to the Gear icon with your company name.
Select Company Settings.
Choose the Advanced tab on the left.
Click anywhere in the Automation field.
Un-check Copy Estimates to Invoices.

Resolution for Issue 'How to stop estimates automatically converting to invoice?' available: Yes (Solved).
Source: Intuit Community forum.

How to stop estimates automatically converting to invoice?: 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 automatically
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