inherited stock sale
my wife inherited some stock from her dad a few years ago. he had invested in a start-up company purchasing 22,500 shares at 33 cents a piece. this investment was basically worthless until they sold the company as they weren't publicly traded etc. The company just recently sold to some investors who are buying all the shares for 1.32 per share, so she has received a nice check. We're trying to think ahead to next years tax time and set aside a portion of this if need be to cover taxes etc.
my QUESTION is: is this income she has received taxable and considered Capital Gains? Is the taxable portion the difference between what her dad invested years ago .33 and the 1.32 it is being purchased for now? Any advice on this would be appreciated. Thanks!