how to use the new TSC Payslips Portal; https://tpay.tsc.go.ke/
To use the portal you must first be registered. Registration is no longer done online. Therefore, once you are employed by TSC, visit the local TSC County office. Remember to carry your National ID Card. Once at this office, the TSC staff will register you online and they will give you a password that you will use to access the T-Pay Portal.
Once you have this password, then, you are good to go.