i would like to know what are the general rates that tax services usually charge to file your taxes,and is $664 to much

this was a 24 hour service but i wasn't informed of the price until i recieved my taxes back and saw the outrages price at the time of having my taxes done i was told to subtract around $300 off top because they where yet to post any fees i keep trying to get in contact with someone to talk about all the fees and i see on the paperwork that the bank charged less than $150 and the tax service which is instant tax service charged a fee of $200 so my question where does all this other money come into play and is this a legal charge or not