How can I get Undeposited Funds to appear in the drop down list on the receive payments screen?

Hello there, linda.

I appreciate you for trying to use a different browser and clearing its cache. The Undeposited funds account is a default one. 

Let's ensure to select Other Current Assets as the Account Type so you'll have the option to choose Undeposited Funds as the Detail Type. 

If the same thing happens, I'd suggest reaching out to our phone support team. One of the agents has the tools that can investigate this issue further. You can contact them via the ? Help menu.

For additional information on this account, I recommend the following article: How to Use the Undeposited Funds Account to Receive Payments in QuickBooks Online

As always, I'm only a few clicks away if you should have questions about this or anything else. Take care.