Couldn’t get a job because I was under 21 is this considered age discrimination or is age discrimination for people 40 and older

Under state law, you can have an age claim for being discriminated against due to your being "too young."

I’m an employee professional (MD),paid by 1099. The employer has held up paying me in full for over 3 months.Recourse?

Contact the Department of Labor to pursue your unpaid wages. You can do that on your own, or hire an attorney to represent you through the process.

CAN I KEEP MY 4 WEEKS VACATION AFTER CHANGE MADE THAT A MAXIMUM OF 2 WEEKS IS ALLOWED?

More information would be needed as to the vacation policy. If you accrue and earn the vacation time based on the time you work, you should be...

I would not think it would show up in this scenario.

Can I get my misdemeanor expunged?

No, you will not be able to get it expunged, but you should talk to an employment attorney if you feel as though you are being denied employment...

No, it is not illegal for your employer or a company you are doing business with to call you after 9:00 pm.

Promotion while on H1B?

I would suggest reposting this question under the immigration law practice area.

It is possible. It really depends on how thorough the background check is.

What if I got a better job offer while I have signed a contract of one year, can I leave the job and notify them one-month ?

The answer to your question will lie in the terms of your contract. You should have an attorney review it for you so that you are aware of your...

Can manager of a bar interfere with tips in any way?

By your question it is unclear how the manager is interfering with tips, versus changing the schedule. Managers can certainly change the time of...