Hi there, easttv.
Allow me to share some information on how journal entry numbers work in QuickBooks Online.
QuickBooks uses a numbering sequence for journal entries (and custom transaction numbers). The system automatically increases it by one based on the last number entered.
If it's randomly auto-populating, the sequence might've been changed manually. You can combine letters and numbers when entering Journal No. field into the screen.
You can check out this article for more details about creating journal entries can be found here: Create a journal entry in QuickBooks Online.
I’m adding some resources that will guide you on how to manage your journal entries efficiently. These articles provide an overview of reversing an entry as well as printing one:
I'm only a post away if you have additional questions about journal entries and other transactions. I’ll get back to answer them for you. Wishing you and your business continued success.
