Do you need a contractors license to be a sub contractor?

IDK...but I think u need a drivers license

how to get a general contractors license in Texas

yes, unfotunatly i found out the hard way

Yes. You must be licensed in each state you do work in. California has "reciprocal" arrangements with some states that border it which allow an out-of-state license to be valid in California, but...

if my memory is correct / for a handyman contractor-- you will need to register as a sole business proprietor with the county clerks office and you will need a 1/2 million $ business insurance policy...