It certainly has a few very similar looking graphics, the
scrollbars in particular. But if it is, they definitely did a hell
of a lot of customization to make it look different in other areas.
Looking at the html source... I have some doubts. Mentions of
Ajax (although it could be Flex+Ajax I guess), no swf that I can
dynamically perhaps?), and no signs of Flash player. (I suppose
right click could just be disabled to hide that-- which is an
interesting aspect itself.)
Anyway I've heard that supposedly some edition of TT is done
in Flex but I don't consider "blogs" remotely close to a reliable
source. Anyone hear or otherwise see anything about Flex and
TurboTax? (From a reliable source or at least someone that can
offer some proof?)
Something else interesting (if it is indeed Flex) is that
you're able to view PDF files right inside the "RIA"--and it seemed
almost too perfectly integrated.
I'm thinking it's probably not actually Flex, but I guess I
could be wrong.