To those asking. Yes he can go to jail. If convicted of a felony there are usually minimum jail times associated and he would not be able to escape it. It would require the NY governor to pardon him. But he isn't the President. He is, in fact, a private citizen. When trying to access what is possible just think about how the law would apply to the average citizen.
The only caveat is the Secret Service. Would they just leave him in the custody of the prison and then pick him up after he serves his term or would they post someone outside of his cell. That's tricky but nothing prevents him from going to jail.