H1B expires in May, PERM to be filed in next 2-3 weeks. Want to go on F1 if I get admission in april.

I agree with Mr. Berman

Can I accompany my spouse and child to USA on B1 visa?

Agree with Mr. Behar.

Is it true my fiance cant sponsor me if he still lives at home?

more details needed, where is your fiance, is he a U.S. citizen, do you have a proof of extreme hardship etc.

Marriage before divorce with first wife...?

It is a serious issue of bigamia, consult with immigration attorney for a complete evaluation of the case.

H1 visa application - COS

Agree with previous answer.

Hi. My H1B visa expiry is 24 june 2014.But my wife's H1B visa got stamped with expiry date as 23 june 2013.

H4 goes attached to your date. Possible Error of CBP. Consult attorney for assistance.

Possible, but reason would be needed. Consult with experienced immigration attorney.

My step father is a US citizen born here in the US, ,

By marriage with your mother, he could petition for you,but detailed evaluation is needed as to your age, maner of entry and other issue.

Call to know when will oath taking be?

About 30 days of waiting and considering winter holidays is normail. Then have an INFOPASS.

For DACA form I-821D an the others, is it better to leave questions blank or to answer them with "n/a" or "none"?

agree with previous answers