I have QB Desktop for Mac 2020 and need to edit my company information.

I'd be glad to help edit your company information in QuickBooks Desktop for Mac 2020, @rexdwest.

We can proceed to the Preferences section to do the task. Simply follow the steps below:

1. Open QuickBooks and then choose Preferences.
2. On the Preferences section, click My Company.
3. Modify your company information.
4. Once done, close the Preferences pane. 

Additionally, I'll be sharing this article to guide you set user and password preferences in QuickBooks Desktop for Mac: User and password preferences in QuickBooks Desktop for Mac. This way, you can choose what users can see and do within different areas of QuickBooks like banking, sales, payroll, or expenses.

Feel free to leave a comment below if you have further questions about editing business information in QuickBooks Desktop for Mac. I'll be happy to lend a helping hand.