Desperate.F1-OPT-H1B Married also have tax treaty
Hi,
I'm desperate in preparing my tax. Here's my situation:
I started to work from Jan 2006 to October 2006 as F1 status (OPT), then from October 15th, I got H1B visa and worked under H1 status. My wife changed her status from F2->F1 and started school from Fall 2006 and didn't have any income (nor do I have a social security number now). We have been married for 3 years. We are all Chinese citizen.
From Jan 15, the first pay period of January, my employer started to withhold my federal tax and state tax using a W4 assuming a married/resident status. And starting from October 15th, by the request of IRS, I had to file another W4 saying I was non-resident and file as a "single", then my company started to withhold far more federal tax and state tax, and additionally, social security and medicare tax.
After doing quite a lot research, we found that non-residents only are able to file as single and can not take any deductions while residents of course are able to file as married jointly and take huge amount of deduction off. So I decided to file an extension first and file our tax as residents in June. Then I have some questions about social security tax and the tax treaty I may be entitled with.
1. If we file as resident/married file jointly in June, do I have to pay back all the social security tax from January 2006 to October?
2. If we file as non-residents, am I supposed to get a refund of the social security tax withheld from October to December? (I think I can't get the money back)
3. I think I can deduct 5000 dollars off from the treaty whether I file as resident or not. Am I correct?
4. Can I also deduct 5000 dollars from my state tax return? I reside in Arkansas.
5. I can file as resident/married jointly on state tax return no matter what status I file on federal tax, is it correct?
6. If I choose to extend my federal return, can I extend my federal tax return only and file my return on state tax before April 17?
Thank you very much. I really hope I can get your answer before the deadline.