It is useful to add employees to the Employee List if you use time tracking, or if you write cheques to your employees. Note that you can't reference employees or users in transactions.
To give an employee access to QuickBooks, create the employee as a user. How?
When you add an employee as a QuickBooks user, you can you use the person's name in transactions (such as when writing cheques to the person, filling out timesheets, reimbursing for purchases, and so on).
If the employee is a subcontractor, you may want to create the employee as a supplier instead. How? That way, you can track payments for tax forms, or track payments in supplier reports.
There are two ways to enter an employee:
Quickly, while you're entering a transaction.
Or, you can enter all the details right now by clicking More info.