My husband wont send me our joint 2013 tax return for me to sign and submit. We are going thru a divorce. I'm not employed.

If there was a tax preparer or accountant who did the preparation then that person can give you a copy. You should discuss this with your lawyer. ...

Do I need an attorney?

You need to be represented by counsel if you want to be sure to get supervised visits.

There are not enough facts here. The state has jurisdiction where the children have resided for the last six months. Consult a lawyer in person.

My Ex now resides with his new girlfriend. They have no sleeping accomodations for our 2 children at the home.

That depends on many factors. I would go in to your lawyers office and discuss these matters in the privacy of his office,

I have a woman who claims I got her pregnant and wants to move in with me.

Obviously stay away from her. If she threatens you go to court and get an order of protection and/or contact the police. Don't file a paternity...

It means he is being arrested for violating the terms of his supervision and can be re sentenced.

If my husbands ex girlfriend says she is taking him to court to terminate his rights will he still have to pay child support?

The ex cannot do that. He would have to agree to an adoption. He foes not have to agree. Even if he agreed to adoption he would still owe back...

Is there a way to request if a marriage over in Nigeria is legal or not?

You should be able to find a Nigerian lawyer by contacting the Nigerian embassy

Am I able to get additional pay information for ex's attempt to modify, and in a short time?

The first date is just for presentment of the motion. Then you need to ask for a continuance for at least enough time for you lawyer to get back...

What are the laws in Illinois about owing child support during years i was disabled and unable to pay?

You could have gone in and modified your child support when you became disabled but since you took no action it continued to be owed with interest....