Do i file i-485 alone or also supplement A?

probably not - usually thats only if you have another priority date before April 30, 2001.

How to file i-864 with two sponsors?

You need a mother I-864 for your father. You will both sign separate ones. This is a complicated document, so you might want to consult with an...

Can I travel out of USA with AP and approved I-130 while my student visa has already expired and my I-485 is still pending?

Not a good idea, stay in the US until you get your greencard. Why risk problems when all you have to do is wait. The baby will still be a baby...

Can I travel using AP card to Vietnam from US with overstay status and wait until my I-485 gets approved?

Traveling is not recommended, stay in the US until you get your greencard.

What is my current immigration status

You can put F1 and then underneath expiration date D/S.

Best option if TN visa gets denied?

No easy way to address this, if her TN is denied then have a consultation with an attorney to figure out what to do. She could try to enter the US...

What is the correct immigrant Visa to bring my 2 yrs old kid to U.S. and all final adoption formalities completed in India.

You will need to file an I-130 for her and then either adjust her status if she is the US or file for an immigrant visa at a US embassy in India. ...

I am L2 visa holder . May have some Way I can stay in US if i get divorced ?

Maybe but you need a consultation to go over your background and various immigration categories to see if there is a fit that will work. There is...

If someone has long overstay want to go back how it is possible?

You just leave. You won't have any issues leaving the US. HOWEVER, if you have been here a long time, once you leave, you are likely to have at...

We are US immigration lawyers on this forum so we cannot advise you about Canadian law. If he marries you and is already married in the US, then...