When in PA, I advised every prospect to NOT do payroll in MAS 90. PR tax laws in that state are ever-changing and impossible to keep up with. That being said, I do have a very large client who I support that uses payroll. THe school taxes are part of the local tax (normally 1%, sometimes more; city of Philadelphia is almost 8% for residents, half that for non-residents), but some localities do charge an Occupation tax, which is a one-time charge annually, at least in the districts that my clients dealt with. We handled that as a Deduction. I never heard of a weekly OPT tax, but I wouldn't rule it out; my sole experience was in the Philly metropolitan area, but I've heard that things in the western part of the state can be crazy - probably influenced by those fools in Ohio (no offense, Alan).