Can I change my F-1 visa (with a pending for Asylum) to H-1 visa legally?

I agree with my colleagues. With an F-1 status, an employer can file an H-1B petition for you. Best of Luck.

Canada visa application if out of J1 status

I would consult an immigration attorney in Canada. Best of Luck.

Do I need to take visit visa for Canada?

If you are an LPR you should be able to enter Canada on the green card alone. Best of Luck

You can always write a letter and attach any documents necessary. The letter should clearly have the case case or receipt number on it. Best of Luck!

Regarding a question 'Have you ever been refused a US Visa' on DS-160

You should answer yes. Best of Luck

Asylum Question

I don't believe it will be transferred to headquarters. Generally the local asylum office will review it. Best of Luck.

Traveling to India with an expired visa while change of status is pending

You don't have to withdraw your petition with USCIS. It will be considered "abandoned" when you exist the US and will be denied. Best of Luck

How to apply green card,

See this link: www.uscis.gov this can give you a overview of the process. Best of Luck.

Hello! May someone explain me that. The rotary club sent me an invitation letter for an annual conference but the consul

The consul was most likely not convinced that you would leave the US at the end of the conference. Best of Luck.

1) H1B transfer under premium processing is closed right now? 2) How many days it takes for receipt number to come

It is not closed. I suspect your attorney or employer's attorney will give you a receipt soon. Best of Luck!