The State's Attorney/District Attorney or your State's child support agency can do this.
The courts can do this, as well as the State child support agency.
Yes (but not SSI).
If you owe back child support then both state and federal taxes can be intercepted.
It federal law. see link
Yes; child support is not affected by or discharged in bankruptcy.
The IRS does not garnish these payments (except from their employees). The IRS will, at the State's request, intercept tax refunds to collect unpaid child support.
Yes. They can intercept any and all wages be it federal,local or state.
The State child support agency does this.
Court ordered child support, spousal maintenance, federal or state taxes, a court ordered restitution for personal injury and/or property damage.
Yes, a garnishment for child support can be placed on anyone. If you receive a check from your corporation as an employee, your state can garnish it.
You should speak with your State's Child Support Enforcement Agency (the official name of that agency varies state to state, but it's usually called something along those lines).