Hello, Saad.
An adjusting journal entry is a unique kind of journal entry that adjusts the overall balance of an account. Accountants frequently use adjusting journal entries to record unclassified transactions or fix minor errors.
Since you can only use this option if you have QuickBooks Online for Accountant, it'll display as False for any journal entry (JE) created in QuickBooks Online Simple Start, Essentials, and Plus subscription. Refer to this article to guide you in creating JE in QuickBooks: Create a journal entry in QuickBooks Online.
I recommend contacting your accountant if you're unsure which account to debit or credit to keep your books accurate.
Furthermore, you can get insights into several aspects of your business via financial reports. I've added this resource to know the reports that are accessible based on your QuickBooks subscription: Reports included in your QuickBooks Online subscription.
If you need anything else, please let us know. We're always here to help you.