Is it possible for me to apply for TPS, is there provision for late filing? And what needs to be done.

There is in fact a provision for late filing. I suggest you contact an immigration attorney to get this started at once.

My family has a right to stay in the US until the receipt of the green card?

If you proceed as described, you may have trouble because your intent upon entering the US with a tourist visa should not be to immigrate to the US.

How much does it cost to do all the paperwork for citizenship after two years of being a green card holder (cr1). As I am infor

The application fee is $680. The attorney fee is up to the individual attorney.

Does the US legally permit people to have dual citizenship with Hungary being the second country?

I agree with my colleague: children should be fine holding dual citizenship.

Any thoughts please, thanks, God bless.

The mistake can have many consequences. I suggest you consult an immigration attorney.

Yes, the individual can refuse to sign but charges of abandonment are likely to follow.

Can 18 year old DACA adjust Status?

No, DACA is not a nonimmigrant status so you cannot use it to adjust your status. You would need someone to petition you.

Can I take Microsoft to court as in law suit or some other way?

The fact that they have given you 7 devices this far indicates that they are trying to rectify the situation. Unless this is a widespread issue, I...

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It's been 2 months that I received my receipt notices for I-485, I-765 and I-131, till now not received biometrics appointment.

I agree with my colleague: perhaps you should look into scheduling an infopass appointment at the Manhattan field office.

Do I need proof of financial support? N-400, Citizenship application. Living separately but not divorced yet;

You do not need to provide any proof of financial support unless you support your spouse financially or vice versa. I suggest having an attorney...