taxes and adjustment of status

[99jjeerwerc 1]

Hi everyone. I'm confused about what I should do with my taxes. First of all, I'm doing AoS (I married a USC) from a student visa (F-1) and we have our interview on the second week of march. Right now our financial situation is not the best: my husband didn't make enough money last year and for this reason we used his dad's income. On the other hand, I was an Aupair until last June and then I changed my status to F-1. Since I didn't have all the money to support my F-1 status, I had to use a sponsor which happens to be my father in law. I didn't make enough income when I was an Aupair and I haven't had any income ever since I became a F-1, 'cause I'm not allowed to work. Oh I forgot, I got this 1098 form from my school and it says how much I paid for tuition last year (above $5.000).

Just a few questions:

1. Should I file as "married filing separately"? or should we file together?

2. I don't understand that much about taxes but I know that some people can claim his/her spouse as a dependent and get a tax break? Can I do that with my husband?

3. Should I wait to file taxes until after the interview? I haven't changed my name with the S.S and right now it would be difficult since I don't have a strong reason to do it.

4. If my parents in law claim my husband as their dependent, can I claim him too?

5. Can I do online filing?

I appreciate any help