No, you would not have to. It is only the first time that you would enter complete details for an employee. In case you are generating a pay stub for the same employee the next time, all the details can be auto-populated.
Also, you can make use of the Address Book feature in 123PayStubs that lets you add and manage company and employee details in your account such as add a logo for each company, and add the employees and contractors working in each business along with their federal and state withholdings. By doing so, all the details will be prefilled when you create paystubs the next time without having to enter it manually.
202 E Main St,
Rock Hill, SC 29730.