Can you get the date of a dat changed in ny?

No, you can't change the date. But you should hire an attorney to appear for you to argue that a bench warrant should not be issued based on a...

I was arrested once but the officer told me it does not go in the system. What does this mean?

How long ago was this? Did you ever go to Family Court?

I asked a question but there is more to it

If he has already been sentenced it is unlikely the order can or will be changed.

Can I file a complaint against someone with an open domestic violence case?

You can file a complaint at anytime if you believe a crime has been committed.

Do I plead Guilty?

No, DO NOT PLEAD GUILTY. An experienced defense attorney may be able to get the case dismissed.

Nobody can predict the answer to your question. Hire an experienced defense attorney who can fight the new charge.

What would his sentencing be?

It's impossible to answer your question. It is also possible that the judge won't care. What you described is relatively minor.

I went into a store with my boyfriends little sister, she stole a purse and ran out of the store into the car.

Do not talk to the police without a lawyer. If you can't afford to hire a lawyer all you should say to the police is: I want a lawyer!

How much time can you be doing ?

For the A felony a person could get life without parole.

No bench warrant = charges abandoned ?

Probably not. In all likelihood the charge is still pending.