Can I move my career from non-IT major to IT? Will this affect my OPT extension and H1B

If your opt is based on your biology degree work in an unrelated field may preclude an extension. Since you do not have an H1b yet it is possible...

Under removal proceedings? Is the approval of I-130 grant the green card automatically?

Approval of i130 does not guarantee a green card if you are in removal proceedings granting of permanent residency will be determined by the judge.

Can I stop my boyfriend from being deported if I marry him legally?

We really need more info to advise you. Consult an immigration attorney.

How can an international students change a student visa to a work visa?

After you graduate you can apply for an H1b visa if you have an employer willing to sponsor you

Can my wife change from her maiden last name to my last name, during or prior to Citizenship application?

Yes she can change this on her N400 application or in her interview.

H4 stamping in Canada for change for status from L1 to H4

It is always preferable to apply in your home country.

I am applying tourist visa for honeymoon trip in Florida with my wife.

You need to file online a da 160 and show you have ties to your home country including family, real property and employment. Call an immigration...

That is unusual. USCIS typically corrects these pretty quickly. Having said that it will not impact your transfer to a new employer.

In case of Concurrent H1B, which petition to use while getting H1B visa stamped on passport?

Go with the concurrent employer as it is for a longer period of time.

Green Card Application and Travel outside USA

We need to know your current status. If you are in H 1b or L 1 visa filing a gc application won't impact your travel. If you do not have an h1b or...