Notice the “Deposit to” line with a drop down menu of possible accounts, with Undeposited Funds account as one of them. This is where you select if you want to deposit your customer payments to Undeposited Funds, checking, or any other accounts.
If you want to instruct QuickBooks to default all customer payments to Undeposited Funds account, you can do it by opening Edit > Preferences > Payments > Company Preferences tab, and check the “Use Undeposited Funds as a default deposit to account” checkbox. This will automate all your customer payments to Undeposited Funds account and the “Deposit to” line in the above screen will disappear.
Note that you do not have to use Undeposited Funds account if you don’t want to, say if you like each and every customer payments show individually, as long as you make sure you deposits them individually. In the above example, you have to make 3(three) deposits to your bank account.