QB Issue Resolution:
You can change the invoice number without loosing your estimate. I hope this gives you peace of mind. Please let me know if you have any further questions.
Resolution for Issue 'If you created an invoice from an estimate and need to change the estimate number, will it still link to estimate?' available: Yes (Solved).
Source: Intuit Community forum.
If you created an invoice from an estimate and need to change the estimate number, will it still link to estimate?: 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 already
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