When can i apply for citizenship ?

I agree with Attorney Perez. See also: http://www.uscis.gov/citizenship/learners/apply-citizenship

Do I qualify for DACA, if I can to USA in 2009?

Unfortunately no, you were not in the U.S. earlier enough to qualify

Unfortunately no, you were not in the U.S. earlier enough to qualify

Demand for witnesses or evidence

There is no required form, but depending on the state you live in, there court website / bar website may have templates you can look at

Should I use my new last name after marriage to USC on I-485 application ?

You should put the name you intend to use going forward. based on the information you provide, i would take it that is your husband's last name...

What is our next step in immigration?

You could definitely run into issues on Saturday. CBP officers may deem your wife an "intending immigrant" due to the fact that she is bring so...

I have F-1 visa and I won dv lottery of 2015, due to some personal problems I couldn't study.

You cannot adjust status if you are not in valid status. If you have not studied in accordance with your F-1 visa, then you are not in valid...

Regarding L1 B visa validity dates and Extension query

There are too many issues to analyze here, to many possible scenarios to adequately advise you on this forum. You should either consult the...

I was born in the US and lived in MX. Getting married to MX citizen how can I bring her to visit my family

She will have to submit an application for a B1/B2 visa at a US Consulate / Embassy near where she lives. Travel for holidays is permitted, but...

How I can get Canadian permanent residency?

Please consult with a Canadian immigration lawyer