Hi randallk!
Thank you for the additional details. I see that it's more convenient to have only one account for depositing payments, including paper checks. However, QuickBooks Cash and QuickBooks Online are not designed to capture and process deposits for paper checks like what banks do nowadays. Because of this, you would still need a bank account where you deposit the check payments.
You can check articles about QuickBooks Cash to review the features.
Let me know if you have more questions in mind. Have a good one!
