Is it a bad idea to study for the TASC (GED) test while studying for the SAT?

So I’ve started studing for the TASC test (which is my state’s GED) this month. I was thinking about taking it in April, but i found out my area doesn’t have an April date. There is March, May, June, etc. I don’t want to take it in March because I think I’m going to need just a little more time to study the math section. (I’m very far behind…)
So i think May is the best option for me.
I also want to take the SAT and/or the ACT. problem is the dates for those are May 5th or June 2nd for the one, and June 9th or July 14th for the other. I was thinking about taking either one or both in June

Is it a bad idea to study for the TASC from January-May and the ACT/SAT from March-June. Would it be okay to indepth study the TASC from Jan-March/April and only review for April/May. While doing indepth study for the SAT/ACT from March-June?