Im a US Citizen, Do i need a Certificate of Naturalization to file a I-130? And how much is the total cost for I-130?

You need proof of US citizenship. Did you acquire US citizenship via naturalization? Do you have a US passport?

Perhaps your employer had not previously had their immigration counsel count the number of days you were actually outside the US for any reason. ...

Would my explanation letter be sufficient in response to part 3 , question 18 ,form I485 ?

In my opinion, you have already provided too many details.

Given name in passport contains first and last name

The company attorney filing the H-1 B portability petition should complete the forms using your legal name. If your name is incorrect on your...

Can an immigrant with DUI records be absolved and get a VISA?

Usually, a single DUI offense does not make a foreign national inadmissible. I recommend that your fiance hire an immigration attorney to review...

What is going to be with my kid?

Your new husband can sponsor you and your son.

Continue to help her to get her green card after that she applied for i-751 and they got an interview but they didnt get well i

I'm not sure I understand your question, but I am in Maryland if you would like to discuss the details

Is it okay to take long term leave on H-1B, but still remain in US?

No- you risk having to start all over

Presently i'm working under H1B visa. I have a pending EB3 petition. What would happen if my priority date becomes current?

If you have not yet filed I-140, file that and 1-485 along with employment and travel authorization requests

Can I visit my country if I change my F1 status to working visa?

Before you do anything, have an immigration attorney assess whether you are subject to the 2 year foreign residency requirement that you may be...