My parents have visitor visa, now I am planning to apply green card for them. Can they travel to US once I file I-130 ?

Your parents may attempt to travel on the current visitor visa however there is a possibility that they will be refused entry given the immigrant...

Can i type and write with black ink ?

Yes you may type as well as write with black ink. Make sure all is legible.

Is it better for my wife (now a US Citizen) to sponsor her sister (Vietnam) for a US Tourist Visa or me (naturalized citizen)?

Generally a sponsor is not needed for a visitor visa. Your sister-in-law should apply for the application on her own. You may provide her with form...

Proof of domicile

You may submit bank statements, tax returns, drivers license, insurance records, etc.

A misterminor charge can disqualified a person after been apply for u visa

It is best to have an attorney review the conviction and charge to determine what consequences if any it may have on your U visa application.

Can I apply to have my spouse travel to the US while she's waiting on the process of her I-130 packet?

Your spouse may visit if she has a valid visa to do so however there is no guarantee that she will be allowed entry given the pending immigration...

When I’m I eligible to apply for my citizenship, if I’m over 18 and my father is a citizen?

I agree with my colleagues re: deriving naturalization benefits of having entered the US legally, and your father who had custody of you...

It is very difficult to determine why you were called in without your spouse but you should attend with G56 notice, proof of identification and be...

Immigration I-485 denial: if USCIS denies I-485 application, how would they send the notice?

They will mail you a notice either way if approval or denial.

Will it change my overstay status if my parents are coming to usa to seek asylum?

No their application will not impact your overstay.