No, they won't receive any email notifications, masterswimmer196. Let me explain what happens after you remove a user.
Once a user has been deleted, they'll not be notified. They'll only know they have been removed when they try to access the account and see the error message: "We couldn't find any companies for this account."
Please keep in mind that deleting a user is permanent, though you can still view their history in the audit log.
To delete a user, here's what you'll need to do:
- Go to the Gear icon at the top,
- Select Manage users.
- In the Manage users page, locate and select the dropdown button in the Action column.
- Choose Delete.
- Click Delete user from the pop-up window to confirm.

For more information on managing user profiles in QuickBooks Online, you can check out this article: Add and manage users in QuickBooks Online and Intuit Enterprise Suite.
For future reference, this resource outlines the limits for billable users, chart of accounts, classes, locations, and custom fields: Learn about usage limits in QuickBooks Online. It also explains what happens when you reach those limits.
Additionally, our team of experts can guide linking your accounts, automating tasks, and improving bookkeeping practices. Check out QuickBooks Live Expert Assisted for more details.
If you have any further questions about managing users or other QuickBooks concerns, please click the Reply button and post them in the comment box. I'll get back to you with answers.