A colleague has shared a helpful response to your inquiry, @ctpsw. I'll direct you to her answer so you can quickly determine which payments were posted into a deposit in your QuickBooks Online (QBO).
You can visit this link to see her response: https://quickbooks.intuit.com/learn-support/en-us/account-management/re-how-do-i-find-which-payments...
Please let us know in the comment section if you have other questions related to the program or need assistance with your QuickBooks-related concerns. Rest assured, we'll be around to help you promptly