Hi mjc19!

The Accountant version is different from the regular versions. For this reason, you're unable to switch to it.

If you'd like, you can invite an accountant with a QuickBooks Online Accountant subscription to do adjusting entries. Just click on My Accountant on the left-hand side of the Dashboard to invite one. If you don't know one, you can find an accountant near you.

You can always go back to this thread if you have other questions in mind. Stay safe!