Editing Amount Charged in Customer Time Register

I am using QB Desktop, 2023 accountant's edition.  

I need to edit the amount charged in customer's time register.  I access the register by selecting Customers, Enter Statement Charges.  I select a customer and go Time/Costs.  I select the time charges for which I wish to bill.  I am then returned to the the customer's register of charges and payments. 

I cannot edit the unbilled charges in the register.  I can edit the every other entry in the register.  I cannot edit the total amount charged for each line item.  In the past, I could edit the amount and the rate would automatically adjust.  No longer.

What do I need to do to allow me to change the amount charged?  

Thank you.