So I finished Dad's 2014 taxes, and early. owie ouch ouch! I won't be specific about numbers, but he came out with much greater income than previous years and owing a large, large amount of taxes. I was very highly peeved that TurboTax required me to buy their elite program for an extra $30 because Dad had ONE 1099-B form (brokerage activity). I kind of felt I should have gotten a trial version for just one.
I was alarmed by the big numbers and contacted the accountants. They advised me to file for an extension but pay the money; that way I won't have to file an amended return nor risk penalties. We'll have an appointment some time after the 15th and go over everything. Works for me.