Yes, you can file the I-129F while she is in the U.S.

My H1b extension i129 was denied after RFE response was received by USCIS. My current i94 is expiring on march 2019 .

I don't see why not. So long as you are still in H-1B status, the fact that one extension was denied does not mean that another will also be denied.

Can USCIS deny my N400 application if filed online 1 day before the 90-day early filing period?

I agree that USCIS will deny the application if it was filed one day early. You could file a new application now, however you would need to pay the...

Will be cap exempt after graduation or i have to go into the lottery again.

It looks like you still have about 1 and 1/2 years of H-1B time remaining. So an employer could file an H-1B petition for the period of 6 years...

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TN status after getting EAD (spouse is primary applicant)

This is such a specific individualized question that you should arrange for a consultation with a lawyer to provide advice on your options.

This is exactly the kind of situation that will present a problem for you in the I-485 interview. If the USCIS officer believes that you made a...

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What will happen after I update my address on the USCIS website? Will I get a new letter with my new address? (Im DACA approved)

The USCIS will not send you a letter about your new address. You can apply for a PA license by showing your current evidence of DACA status and...

What do I need to know before my wife files petition for me?

A lawyer would need to know a lot more about the facts of your situation to be able to advise you. My suggestion is to schedule a consultation to...

Is IT OKAY IF I ISSUE THE CHECK FOR FORM I-130 NOT MY SPOUSE, THE PETITIONER?

It does not matter who issues the checks. You do not need to write any memo on the checks or on a cashier's check.

Can I continue working on L1B visa for US office if my employment with Moscow office will be terminated?

You do not have to continue to be employed with the company abroad, so long as there still exists a related company abroad (the one you worked for...