taxes (See http://stanford.wellsphere.com/healthcare-industry-policy-article/puerto-rico/267827 ), federal commodity taxes (See http://stanford.wellsphere.com/healthcare-industry-policy-article/puerto-rico/267827 ), social security taxes (See http://www.irs.gov/taxtopics/tc903.html ), etc. Residents pay federal payroll taxes , such as Social Security (See http://www.irs.gov/taxtopics/tc903.html ) and Medicare (See http://www.reuters.com/article/healthNews/idUSTRE58N5X320090924 ), as well as Commonwealth of Puerto Rico income taxes (See http://www.puertorico-herald.org/issues/2003/vol7n19/USNotInnocent-en.html and http://www.htrcpa.com/businessinpr1.html ). All federal employees