There are a couple of ways on how to record sales in QuickBooks.
The first option is to use the Sales Receipt (Plus icon>Sales Receipt) function. However, you'll need to create record each customer's sales one at a time.
The second one is to use the Bank Deposit (Plus icon>Bank Deposit). It allows you to record bulk deposits from different customers and to select the income account.
Lastly, you can record sales by creating Journal Entry.
Let us know if you have any questions. Thanks!