Anthony's employer refused to refund the Social Security and Medicare taxes that were withheld in error. Anthony has held a foreign student F-1 immigration status since he arrived at the beginning of last year. Which of the following is not a required document to submit with his Form 843?

	Form I-20, Certificate of Eligibility, endorsed by alien's student advisor and stamped by the USCIS
	Employment Authorization Document of your Optional Practical Training
	Copy of alien's valid entry visa
	Copies of pay statements that cover the period of exemption from Social Security taxes