If you're accessing Customers > Deferred Revenue Journal for the first time, you will be prompted to choose your deferred revenue account. If you need to change the deferred revenue balance sheet account after the initial setup, go to Settings (Top Navigation Menu) > Organisation settings (Left Sidebar)> Deferred Revenue accounts.
How to change the deferred revenue account for deferred revenue journals
Learn how to properly update the deferred revenue account for deferred revenue journals in just a few simple steps.