Hello, DebbieK61.

I can walk you through the steps of getting to the receive payment screen. 

To be clear, are you attempting to apply the personal check as payment to your customer's open invoice? If this is the case, you can deposit the check first, then use the Account Receivable (AR) account to link it to their invoice.

Here's how:

1. Click the + New icon.
2. Select Bank deposit.
3. Go to the Add funds to this deposit section.
4. Choose the customer who pays you with a personal check in the Received From column.
5. Select Account Receivable from the Account field, then choose a check from the Payment Method area and enter the amount.
6. Once done, hit Save and close.

After that, apply the deposit as payment to the open invoice.

Here's how:

1. Click the + New icon.
2. Select Receive payment.
3. Choose the correct customer from the Customer dropdown.
4. Ensure to select the correct invoice under the Outstanding Transaction section and choose the deposit you created for the personal check in the Credits section.
5. Once done, hit Save and close.

Check out this article for more insights: Record invoice payments in QuickBooks Online.

I've included the following helpful resources below if you need help with customer credits or overpayment for future reference:

• Record a customer refund in QuickBooks Online
• Handle a customer credit or overpayment in QuickBooks Online

Don't hesitate to post again if you need further assistance recording payments in QuickBooks. I'll be around to help you.