Business & farm

So it sounds like you need to buy separate versions for submitting personal vs. a business? You can't buy the highest version and then just use twice? I full own topmarq, a c-corp, but normally have to do the 'self-employed' version of turbotax anyways because I worked out of the country for a bit. So can i just buy one or does it keep the personal separate. Thanks! Sorry for thread jacking, just seemed pretty close to my question.