Hi userharmonizedtherap,
Welcome to Community! It's always a good idea to save your account data if you're planning on opening a new account or importing the information to another source. Although we'd be sad to see you go, QuickBooks Online has just the feature you're looking for, so you can export your customer list effortlessly. I'd be glad to show you how!
To export your customer list, follow these steps:
1. Click on the Gear in the top right of your account
2. Select Export Data
3. Click on the Lists tab
4. Make sure the toggle is on for the customers
5. Hit Export to Excel when ready
That's it!
Here's an article for your reference on how to export data from QuickBooks Online.
Please reach back out if you have any other questions. We're always happy to assist!