I'll share details about the program, greg-wilken.
Time-tracking is currently unavailable in QuickBooks Self-Employed. You'll want to use a different time-tracking application to help you track your working hours.
Then, follow these steps on how you can add the time details when creating the invoice:
Go to the Invoices menu and click Create invoice.
Click Add work, then select By hour.
Add the amount per hour and repeat the same steps for the rest of the time details.