We didn't use QB to track this either. But when it came time to file, I created the accounts and payroll items as described here: https://quickbooks.intuit.com/learn-support/en-us/pay-schedules/how-to-set-up-and-track-the-employee...

Then I created a paycheck for an employee dated in Q2. I removed all the usual payroll items, and added to the "Other Payroll Items" section the payroll item "CARES Retention Emp". I entered $1.00 for this item and saved the paycheck. Then when I went to create the 941 form, Worksheet 2 shows up and I am able to override (right-click and select "override") the $1.00 and put in the correct amount. After filing the 941, I'm going to delete the $1.00 check.