Let me help you apply for your customer payments in multiple projects in QuickBooks Online(QBO), Kim.
QuickBooks Online can manage projects to track your project's profitability. To rectify this without creating a mismatch of transactions with your bank deposits.
Here's how:
In addition, you can check this article to learn how to add paid and unpaid invoices to projects in QuickBooks Online Plus, Advanced or Accountant: Add existing invoices to projects in QuickBooks Online.
Don't hesitate to click the Reply button below if you have questions about managing projects in QuickBooks Online. I'm always here to help. Have a good day.