Hi there, treasurer98.
You'll see two buttons on the Bank Deposit page. Click the Add amount or you can select the Select existing payments if it's from an existing payment.
Here's the article for more details: Add a bank deposit in QuickBooks Online mobile.
Post again here if you have more questions. Wishing you all the best!
Thanks for providing a screenshot, treasurer98. I can help share some insights as to why you're unable to edit a bank deposit using your iPad.
QuickBooks iOS app is an add-on that we're providing along with QuickBooks Online software. With that said, it has some limited functionalities, bank deposit is one of them wherein we're unable to edit it. For now, we can take this as a product suggestion that might add it to future product enhancements.
In the meantime, I've got two options for you as a workaround. You can either delete and then recreate the deposit. Or you can edit it through the web browser.
You can check our updates and latest happenings via our QuickBooks Blog.
Keep me posted if you have other banking concerns in QuickBooks. I'll be around to help.