If you applied before Jan 1st 2020, you will need to fill out a new W-4 (due to the government changing this form). If you don’t fill out a new W-4, your record will be entered into our new system under the highest tax bracket. Click here for your a W4 & send it filled out to payroll@supplemental.com
We have upgraded our backend systems!
Supplemental Staffing has upgraded our business system to allow us to better support you. During this transition, we understand that our employees will still need access to the old system to access things like old paystubs and more.
Below are links to our new WebCenter for employees as well as the old employee login.
Our new primary webservice login is available here:
For basic WebCenter information and guidance, Click Here.