The following article will guide you through how to make report numbers editable.
Navigate to Settings -- Office Settings -- What We See on the ISN -- Report Number Options.
There you will see a checkbox that will allow all report numbers to be editable. Make sure this is checked and hit Save Settings.
That's it! Now head over to View Inspections, and click the number(s) you want to edit inside the Report # column. A edit box will come up for you to enter your new report number.
You can now edit and customize all your report numbers.