I know a way how you can locate the deposit, bookkeeper-saint.
You can run the Audit log report to look for changes or transactions on your QuickBooks account.
Here's how:
- From the Gear icon, select Audit log.
- Select the User who created the deposit.
- Filter the Date Changed.
- Under Events, All transactions.
I've also added this link as your guide in managing deposits: Record and make bank deposits in QuickBooks Online.
You can always post in the forum whenever you have concerns about deposits.