Ok after reading all the posts more thoroughly. Why aren't you buying the Desktop program to start with? The Desktop program can do unlimited returns so you can copy your return to test for next year. And it has a What-If Worksheet. And lets you see all the forms and enter directly on them. And it might be cheaper than using the Online version. You get a free state program download in Deluxe and higher. And as I said above all the Desktop programs have the same forms so you could just buy Deluxe.
