Is it legal to give birth in the US on a visitors visa eventhough all medical expenses will be payed without government help?

I concur with my colleagues. This is perfectly legal.

Can an H1B worker enroll in higher education like MBA or MS while still working on job?

Yes, as long as you comply with the terms of your H-1B this is allowed.

If you entered as a fiancee you were not waived through. You entered as a K-1

Am a permanent resident how can I bring my daughter here?

If your children are unmarried and under 21 you may file a petition for them as a permanent resident. They would be in the FB-2a category. You...

He should indicate that he is self-employed with his Italian address and job description.

Profit to Non Profit

You would not be counted again against the quota as you have been counted within the last 6 years.

Photocopy of the interview notice is sufficient.

get a good landlord-tenant lawyer to represent you. Since this is a civil matter it won't affect your immigration status.

Can an N400 US Citizenship applicant travel abroad for couple months while her application is pending?

Provided the number of days of physical presence in the U.S. is not an issue this should be fine.

U Visa travel?

We don't' know anything about the U basis or your immigration history. If you have previously accumulated out-of-status time then travel may...