Purchase from Big Home Tax

Can someone confirm that this place is a scam?

I purchased the turbo tax product from them and it installed on my machine but not on my mom's machine. I got the dreaded error code 605.

Then i spoke with someone from Turbo tax...third person i spoke with and they said Big Home Tax is a scam. First one just said try reinstalling or my firewall may have stopped it.  That wasnt the case.  I just want to make sure that this is definitely a scam.  I think it is because Big Home Tax does not respond at all.  I spent money on a product that doesnt work. I knew something was up when they didnt respond to me.  I will just buy directly from Amazon i guess. No more finding lowest price. Can someone confirm that this place is a scam?  Price did beat Amazon.