Hi Priya,
You can try to attend SAP US payroll training. Please check the schedule using the link below. You can learn core US payroll using this course.
HR410 - US Payroll | SAP Training and Certification Shop
HR710 - HR710 - U.S. Tax Reporter | SAP Training and Certification Shop
Hope this help. However you need to get help and support from SAP US Payroll expert to complete the project.
Regards
Senthil Bala