It federal law. see link
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).
Yes (but not SSI).
If you owe back child support then both state and federal taxes can be intercepted.
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.
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).
In the state of Florida a creditor is only allowed to garnish a certain amount of your wages up to twenty five percent only if you meet a certain threshold or if it is in regards to child support , alimony , unpaid property taxes or unpaid federal student loans.
The State can place a lien on bank accounts and other assets. The lien freezes the account.