Hi Josh,
In the Weekly Timesheet, the default work week runs from Sunday through Saturday. All you have to do is select the week for the specific employee, then manually enter their working hours for the selected week. Before doing this, you may want to review their pay schedule under Employment details.
Since you're unable to access Payroll settings, I recommend reloading your browser, then signing out of and back in to QuickBooks. Alternatively, use a supported web browser for optimal performance.
We're here in the Community if you need further assistance.