I need your help to tell me how to change the cost of an employee's time thanks

Good day, hillcrest20ca.

Are you trying to edit the employee's hourly rate? If so, you can follow these steps to update the information:

1. Go to Workers > Employees.
2. Select the employee's name, and click the pencil icon next to Pay.
3. Under How much do you pay?, select the pencil icon beside the Add additional pay type, or edit the rate next to Hourly drop-down menu.
4. Hit Done.

Please see the sample screenshot for a visual guide:

I'm also adding this article that includes a video tutorial: Add, Edit, and Delete Employee Hours within QBO.

If you're referring to something else, I'm just a post away. Thanks.