Taxes and filing for citizenship

it will not affect your application for citizenship.

My sister is 21 year old. we have a step dad and my mom just got the resident card. can my mom get a residency for my sister?

not if she (your sister) is out of status.

I am unemployed and a student now.I am a citizen.I am trying to file green card for my mother.

you can mention you are self employed. However, you will need to show evidence that you and wife are able to sponsor your mother. If not, you can...

Who can sponor you

you need to be more specific--sponsor for what?

Green card EB2 or EB3 criteria?

if you have a master's degree, you will qualify for EB2 but you will need an evaluation.

Charged with Class 1 Misdemeanor 7 years back. What would be the status if I apply for a Business Visa now?

You should have a certified copy of the court disposition (although the consulate/embassy does a thorough check) and explain what happened. Also...

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H1B - Laid off - 10 months gap in status - H1B Transfer to new employer. I94 valid until 11 25 10. Received I797 for new empploy

if you were present in the U.S. during the 10 months gap, you are out of status. There is a good chance that USCIS will deny your H-1B transfer...

My GC expires in 2 years, do I need to worry it will be revoked because my citizenship was denied

You will not have problems renewing your green card. As for reapplying for naturalization, as long as you show presence (and all other...

H1B question-leaving USA before VISA expires...do I need to cancel?

you really do not have to "cancel" your visa but you can. Just make sure the next time you enter, you do not enter on the H-1B.

It would cause any damaga to my case if I move in USA but still go back every day to work in Mexico?

it should not affect your case as long as you enter the U.S. legally. However, beware of the intent issue as if you "move" into the U.S., CBP may...