How can 2 underage children obtain US citizenship?

She can file for them to immigrate and upon their arrive, as children of a U.S. citizen, they will be derivative citizens.

I've just gave birth and we want to know how my mother or mother in low can come to help me with the baby for a year at least.

They can apply for visas an nonimmigrant visitors for pleasure.

It is on your record for immigration permanently.

Can a person with an arrest for 3rd degree grand theft be deported once he tries to enter the country?.

If he has a visa, there should be no problem.

How can I bring my fiancè back from Mexco h was deported we have 4 kids and I'm pregnant I'm real stressed and high risk

It depends why he was deported. It also depends if he ever illegally reentered the U.S. after being here without permission or after being deported.

Is it any reason the delay for the "interview notice" from USCIS in Atlanta office. I'm in "testing&intervie" stage 2months ago!

It takes 4 - 6 months to process this type of application so this is well within the normal range.

Do I need immigration lawyer?

You are eligible for adjustment with a waiver.

Can my husband past immigration to Europe effect his entering the USA through the way of a marriage with an American citizen?

What is your question?

I-130/I-485 application Vs Cancellation of Removal application

You would need a 212(h) waiver to adjust, and both adjustment and 212(h) require hardship to your spouse. And you cannot get a 212(h) waiver if...

I-90 Name change on Green card after to marriage (pending) I-130 for spouse, applied with the maiden name (approved)

It should not make any difference.