While the desire to "do this just once" is understandable, it is not realistic -- child support may be adjusted whenever "changed circumstances" arise -- and you are apparently facing two of consequence: unemployment, and new employment/relocation. If you wait, the current order (whatever it is) will remain in effect regardless of your unemployment until and unless someone asks to modify it; support is not modified retroactively.
So your choices are to file to modify once when unemployed, and again when re-employed, or to stipulate with your ex for a temporary modification, and then a permanent one once you have a different income level.
Answered on Jun 02nd, 2013 at 2:52 PM