The customer needs to have the status of Completed. Also, any stipulations that you've set aside (Paid in Full, Paperwork Submitted, Processed, etc.) must be met as well, if you have any of those same boxes checked under Admin > Preferences.
Yes. Your can know whether or not a Tech has been paid on by seeing if there is a 'Paid Date' entered. If there is, you know that the Tech was paid on that partcular adjustment, on that particular day.
Like controlling other rights to Buttons, this feature is found under HR > Lookup Employee tab. Once you're in the Employee's account, you'll see the Account Buttons down at the bottom. if you check Payroll, your employee will be able to see 'payroll' found on the customer's account. If you don't want an employee to see payroll or make any adjustments, do NOT check Payroll.
The Payroll button found on the Customer's Account, allows you to see a full history of the employee's payroll adjustment. You can see what you've paid and which adjustments are still pending payment.
If you click on the customer's name, you will be taken to their actual accont. From there, you can select the Payroll button, which allows youto make changes to adjustments and create new ones.