I think that you may be referring to Form 843, Claim for Refund and Request for Abatement.
An F-1 visa holder who is
substantially complying with the requirements of that visa is exempt from
the requirement to pay Social Security and Medicare -
please see the following IRS link:
http://www.irs.gov/Individuals/International-Taxpayers/Foreign-Student-Liability-for-Social-Security...
If you had Social
Security and Medicare taxes withheld from your pay, you can
pursue obtaining a refund of improperly
withheld Social Security and Medicare taxes
via two routes:
- You can request that your employer refund the withheld
taxes to you.
- If the company will not refund the withheld taxes to
you, you can file a claim for refund with the Internal Revenue
Service on Form 843, Claim for Refund and Request for
Abatement.
For more information,
see the folllowing IRS guide on Social Security Tax / Medicare Tax and
Self-Employment:
https://www.irs.gov/individuals/international-taxpayers/social-security-tax-medicare-tax-and-self-em...
