How do I go about giving up my parental rights. I am not allowed to see my children. Will I have to still pay child support once I give up my rights? Will I have any obligation at all?

Most states you still have to pay child support. Giving up rights isn't all that simple.
I really don't see any purpose in giving up rights.

I've moved this to the Family Law forum where there are hundreds of posts asking the same question.

The bottomline is that getting a TPR is very difficult. Generally they are only granted to clear the way for an adoption or if the parent is a danger to the child. One is never granted to let a parent off the hook for support.

The laws vary and some states separate rights from responsibilities so a TPR might be granted but support is still due. Other states terminate both at the same time making it even harder to get a TPR.

So forget about giving up your rights, it ain't likely to happen. Try fighting for your kids instead.

First you have the right to see your children unless you were proved a threat to them. So why are you not getting to see them? Because you are not fighting for your rights, Sodo what you have to, and see your child.

And almost always after you give up your rights ( if you are allowed to) you will still have to pay child support, so there is little benefit to give up rights, instead fight for and use those rights