If the other party works under the table, how can i file for child support?

You can file, but proving his income has to be done by showing his expenses, no one in this life lives for free.

Should I try to collect child support, I never did because he is not the biological father

This is interesting, it seems the stepfather and his children still want a relationship. That is good for your son, but you do not have to collect...

What rights do i have as a single mother when it comes to the father and grandmother of our child.

Have you asked for child support, why not? He was there when the baby was created, let him pay his fair share and then the age of the child...

How is child support calculated if the CP lives in a different state than the NCP?

It should be calculated according to where the child resides.

My son and his girlfriend where both charged for domestic abruse, went to court and the judge dropped the charges.

It happened, that is all I can say, the judge may have been wrong, but it happened.

Birth certificate change to the real father

No, get a court order directing the agency to change the birth certificate.

Then quit smoking marijuana, didn't you get the message last time? As Homer Simpson so eloquently says "Duh?"

Can my ex keep my son from talking to me?

You can be mature and leave it alone, you son will not die if he does not talk to you for a week, you may, but he won't.

Paying back marital debt

It is ok as long as you can show the payments are going on community debts.

Who claims children on taxes?

The other counsel is correct, absent an order from the court. See if the two of you can come to an agreement by way of stipulation and have the...