Good luck in figuring it out, if that's the route you go. But it might be worth taking it to a pro.

I volunteer preparing taxes, for low income people, and it never ceases to amaze my how poorly many people understand the tax system. If you just have income from a job, pension, or some form of social assistance it's dead simple It only gets complicated if you have a lot of different types of investment income or, as in your case, an inheritance.