ask for kind help on J1 taxt

You would be appreciated greatly for your any kind reply to my questions:
1)Should I submit a 8843 or other any form to IRS for 2002? Now it is 2005, how can I do?
2)I heard the 2 taxes would be not paid within 2 years according to treaty article 19. Can I get social security and medicare tax of 2004 back?

The Situation is shown in the followings:
I once came US as a visting researcher for a short term within 2002 (less than 3 months) and not got any pay from US. I did not submit any forms to IRS because I did not know anything of tax.

At the second season of 2003, I arrived at US as a visiting researcher again but got wages from university. No social security and Medicare tax, of course no federal and state tax. I submitted a 1040NR-EZ to IRS.

At 2004, I was treated as RA, I paid social security and Medicare tax while no federal and state tax.

所有跟帖： 

• 1. 應該, 盡管你沒有PAY. 但現在也沒有補的必要. -stp- ♂ (38 bytes) () 03/01/2005 postreply 09:42:49

• F1/J1不交SS和MED. -h1j1- ♂ (0 bytes) () 03/01/2005 postreply 10:34:40

• F1前5年, J1前2年不交SS和MED, 以後就要交了. -stp- ♂ (0 bytes) () 03/01/2005 postreply 10:39:47

• 他不到兩年. -H1J1- ♂ (0 bytes) () 03/01/2005 postreply 10:41:58

• 02, 03年就是兩年, 這裏的年是年頭, 年底的最後一天來 -stp- ♂ (40 bytes) () 03/01/2005 postreply 10:45:40

• thanks a lot to all of you! -xixiha- ♀ (0 bytes) () 03/01/2005 postreply 11:28:01