I am asylee in USA but I want permanent residency in Canada is this possible ?

Only if Canadian law permits it and you can fulfill the requirements for "Landed Immigrant" status in Canada.

Will I be able to return to US after withdrawing asylum if I have multiple visa

No, since that visa is no longer valid and cannot be used to travel to the USA with.

Does domicile need to be proved for sponsors of F2B application once they become a USC after they lodge petition as a LPR?

Also convincing the US consul that these are genuine steps, and that your true intent is indeed resume domicile in the US.

At the interview after I601 Approved!! They refused section 221g further administrative processing

Husband needs to file for yet another waiver, to waive 'lying to Immigration", on the same Form I-601, with a new fee.

Does domicile need to be proved for sponsors of F2B application once they become a USC after they lodge petition as a LPR?

No proof of resumption of domicile in the US = no immigrant visa issued. it's as simple as that.

That is correct: "When "pending asylum" you have "zero green card options" employment-based, that is."

Will applying for a K 1 visa cancel a current I 130 family based application?

It is not the "K-1", but rather the marriage that will have the effect of voiding the pending I-130 petition. But like attorney Behar already...

I didn't file taxes, can that affect my adjustment of status application?

Hopefully there will be no "foul play" allegations against you. You were the "victim" indeed, however, it "takes two to tango".

If I got married within 45 says of arriving in the US with b1b2 visa can I leave the country if my visa has not expired and ret

You will likely not be readmitted if you attempt this scenario, with your visa being cancelled at the airport. You two will likely end up getting...

Not an immigration law question - belongs in the Child Support forum.