Yes it can have negative consequences. Consult an attorney.

I'm a USA citizen and my husband is not: While filling out the I-130 form we have a question about part C number 16.

The answer is No. He has not appeared before an immigration judge.

How long can I stay in the US if I am found deportable on the ground of false claim to usc?

You can consult an immigration attorney, but a false claim to US citizenship is bad.

What would be the approximate costs for a Jamaican immigrant to divorce his American wife after being married only 4 months?

It will depend on the complexity of the case an the selection of the attorney.

CAN I GET MY STEPFATHER A VISA OR A WORKING PERMIT FOR HIM TO COME BACK TO THE U.S.A??

It will be very difficult for you step-father to come back. He is subject to a ten year bar. Is his wife a US citizen. Best to consult an...

Do I have any legal obligation to report my divorce to the immigration office?!

You have no obligation to report the divorce.

Is it for sure, officer is going to ask files from past employers after I-485 is submitted or after the AOS interview?

It is best to bring all of your questions and paperwork to your employer's immigration attorney.

How long will NVC take to schedule an appointment for me and my sister in Jamaica? Can the NVC delay our case?

You should contact an immigration attorney. Based on the limited facts your sister should be fine. You also need to follow all of the instructions...

EAD

Need more facts to answer this question. What is your EAD based on. You can make infopass appointment or cosult an attorney.

I'm a Canadian in deportation proceedings. Should my fiancé and I get married and file for adjustment of status? Thank you.

You should consult an attorney. There is a very high standard to meet when a US citizen marries someone in removal porceedings.