I am F1-visa student. Currently I am working using CPT program. I leave in US for two years. And I am working the same company for two years. Starting from January, 2007 they ask me if I am a citizen for tax purpose and have to pay social security and Medicare taxes. They also sent this link to me. Even though I leave more than 150 days in USA, Am I considering as citizen for tax purpose??

Link to Publication 519: IRS.gov Search Results

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Thank you for your help
Martha

Martha:

If your total visa time for F-1 and J-1 exceeds five years, then you are considered a resident alien and are subject to ALL the taxes that U.S. citizens pay.

When did your F-1 visa start?