Sounds like you're going to be using some weighted statistical methods in there.
I also read that you're going the Java route. Decent option for handling the load (free tax returns will pull in a big amount of people - assuming they trust the service), but considering you guys are going to be 4-5, perhaps python with the data packages(numpy et. al) might help with AI (which reads like intense probability calcs).
I also read that you're going the Java route. Decent option for handling the load (free tax returns will pull in a big amount of people - assuming they trust the service), but considering you guys are going to be 4-5, perhaps python with the data packages(numpy et. al) might help with AI (which reads like intense probability calcs).