The hardest part is putting out a MVP for the 1040, but allow it to be extensible. I believe that it will be very popular and forks will come in very fast. At

The hardest part is putting out a MVP for the 1040, but allow it to be extensible. I believe that it will be very popular and forks will come in very fast. At the least, it should allow import of data from other providers ( turbotax, etc ) so that data can be stored for as long as one likes. A big advantage is to allow amended returns ( example I need to amend my 2009 return ) - One just pulls out the 2009 code base, put in the previous data from turbo tax and amend it.