Requirements to set up a limited liability corporation in Brazil

Is it worthwhile to leave a limited liability corporation before I leave for the US? I’ll have to leave my CPF active in any case. There’s addtional paperwork that I’ll need to fill out according to KPMG. If I only leave the CPF, I’ll have to fill a simple web form indicating I’m exempt. If I leave the LLC, then I’ll have to fill a full return (I’m not sure if there’s a simple one like 1040EZ).

In any case, the instructions to set up the LLC are here