Thanks for dropping by the Community, @Tracyb42.
The transaction may have been added manually, that's why it was recorded to the Cash account. If that's the case, the option to change/edit it is currently unavailable.
If you've connected your bank to QuickBooks Self-Employe (QBSE), the transaction will be automatically downloaded. Thus, you'll need to exclude the transaction that was manually added.
To learn more about removing transactions in QBSE, I suggest checking out this article: Exclude or delete transactions in QuickBooks Self-Employed.
Please leave a comment below if you have any other questions or concerns. I'll be more than willing to help. Have a great weekend!