Do I need to file a waiver for my I-129F petition for K-1 visa for my Alien fiancee if I filing my petition for 2nd time ?

TNo, you will not need to file a waiver.

Is it possible to get permanent residence if one is a undocumented immigrant through engagement, or only though marriage?

There sre several possibilities as to ways in which you could possibly get your green card but it depends on facts which you have not provided,...

What are the odds of being denied entry at the border on a B2 visa, while I-130/CR1 is processing?

If they are aware at the American POE that she has a pending I-130 there is a very good chance that she will be denied entry as an intending...

How do I protect myself even further from being used to commit immigration fraud?

You can certainly report your suspicions to USCIS. Thankfully you realized what her intentions were and refused to sponsor her for a green card.

I came from Cuba in 1966 at age 2yr; I never got my permanent residency card, can ICE detain me or have me deported?

You need to have an immigration attorney take a look at you situation, including what your status may be at this time as well as any conviction...

As a recent asylee can I marry my boyfriend and put him in derivative status?

If you marry after you received asylum, your spouse will not be eligible for derivative asylum through you.

Paying US taxes after leaving America?

If you were here working on H1B for part of the year, you would only report and pay taxes on money earned here.

How do i apply for derivative asylum for my wife?

If marriage took place after asylum grant, the spouse will not qualify for derivative asylum. She would have to qualify on her own application.

I have deferred action, but I am also married to an American citizen. Should I file for citizenship or wait?

You will not be eligible for naturalization until you have been a Lawful Permanent Resident for 5 years, or 3 if you are married to an American...

You would need to discuss attorney's fees with the individual attorney as they vary from attorney to attorney.