N400 application

You may have acquired automatic citizenship.

Can I go to Canada for four days and enter US again with my F1 visa?

Did you file for advance parole, Form I-131?

Can I refile my husband petition even though we dont know if we are approved last petition or Deny.

You should not refile It sounds like you will be getting a Stokes interview wherein you both will be questioned separately.

Is a birth certificate with only a year of birth acceptable for I-130?

I would see if you can get any records from the government as to their date of birth.

1. Can I work for a company for only equity (while working my current job) ? 2. Can I invest in private businesses ?

You would most probably need a business visa.

Supervisory Review after Background check? is that common ? How long this process takes?

Can take a while. You may want to consider making an Infopass appointment.

You may be entitled to do so if you have a separate TN visa from the other source.

Can my husband sponsor my green card if his income was over $20k in 2015 but under 20k in 2013 and 2014?

The income requirement is for the most recent year - 2015.

Can my children be included in my green card application?

Separate applications needs to be filed for each individual. So it would be 3 filings.

If i marry a foreign citizen,while she visits the United States , would she be permitted to stay. Or go back then return.

All my colleagues are correct as to the intent fsctor. However, if things change while visiting the USA and one decides to get married, one is...