Is there a rule by USCIS that says you have to be on a F1 Visa for a certain time duration and then change to H1B?

No - there is no 'time-frame' for you to be in F-1 status for a certain length of time before an H-1B can be filed on your behalf. If a U.S....

I and my wife filed i485 together in April 2014, I got the green card and her sis still pending in "acceptance" phase.

If the pending I-485 application is still within the current USCIS processing times then you have to wait. You can contact USCIS customer service...

Permanent resident GC (marriage based) leaving US for 1 year, what do I need to give USCIS?

If you plan to leave the U.S. and be abroad for an extended period of time, then you should apply for a Re-Entry Permit. You can find information...

Should I put my alien number now on my revised application I-864?

If you have an A number, it should be stated on your forms and applications. If you have questions about the I-864 form or specific issues related...

Other options for non-Availability of Birth Certificate.

Your mother will need to provide a Non-Availability of Birth Certificate and other secondary evidence such as affidavits from relatives or family...

Can I resign from my employer who sponsor me in a working visa once i become a U.S. immigrant?

If you are now a permanent resident , you no longer need a non immigrant work visa to be employed in the U.S. If your current employer is the one...

Is it possible to cancel a J-1 visa to pursue a Hb-1 offer from another sponsor?

If the prospective H-1B employer is "cap-exempt" and if you are not subject to the two year foreign residency requirement under your J-1, then it...

Is my immigration attorney incompetent? Still stuck in Green Card step 1 after several months.

The Dept of Labor decides what the specific occupation code will be for a PERM position. It does not necessarily mean that your attorney...

If you have a U.S. employer who is willing to sponsor you for your employment based permanent residence ("green card") process, it does not matter...

My spouse is on his OPT ext. It expires this Sept and we have yet to file for GC. How do we prevent him from losing his job?

Your husband will need a valid Employment Authorization Document (EAD) in order to be legally employed in the U.S. IF his OPT and current EAD...