What does "id" mean on audit lof reports?

Hi, @JWD. 

The ID on the Audit Log report refers to the transaction number. It is the sequence of added and modified entries from the (+) New icon, including payroll. 

I've added these screenshots for your visual references.

Here's an article you can read more about using the audit log in QuickBooks Online.

You can also check out the topics from our help articles for more resources while working with QuickBooks.

If you have any other questions about the audit log or any reports, please let me know by adding a comment below. I'm always here to help. Keep safe!