Hi alexandracleaver,
Welcome to Community. QuickBooks Online lets you manage users on your account, when updates to accessibility are needed. I would be glad to help!
Managing users on your QuickBooks account, is only accessible by the Primary Admin. If you're not seeing the option to Delete an accountant, it may be that they are the Primary Admin. If this is the case, don't worry, we have you covered. Follow this link for assistance with changing the Primary Admin on the account.
For additional assistance, please don't hesitate to contact our QuickBooks Online Customer Care team at 1-833-317-2226, Mon-Fri: 9am-8pm ET. They will be happy to work with you directly, and ensure you're able to accomplish your QuickBooks goals as soon as possible!
If you have any other questions, please don't hesitate to reach out. We'd be happy to assist!