Welcome and thanks for visiting the Community, @judikenney-iclou.
Accessing Journal Entry (JE) in QuickBooks Online (QBO) is pretty easy. This can be done by clicking the + New option at the upper left, then selecting JE under the Other column.
If you're uncertain what accounts to credit and debit when creating, it would be best to consult your accountant for guidance.
Also, consider checking out this article for more information about recording JEs in QBO: Create a journal entry in QuickBooks Online.
Leave a comment if you have any additional questions, and I'll get back to you as quickly as possible. I'm always here to help. Have an amazing rest of the day!