Lucky for you, you're way off.
You don't have to submit a form 1.
You don't have to pay a 200 dollar tax.
You don't have to file ANY paperwork.
IF, that is, IF, you are building the rifle in a post-ban legal configuration and it has a 16 inch (or longer) barrel, and there are no laws in your state prohibiting you from doing this.
And you are a private citizen, and not a licensed firearms manufacturer.
The form 1 and 200 dollar tax apply ONLY to the making of an NFA weapon, which can ONLY be done via a duly licensed title II manufacturer.
Believe me on this. Ask around in the 'do it yourself' forum and you'll get the same answer, over and over.
However, and this is important: Unless you ARE a title II (class III) manufacturer, you can NOT make a PRE-BAN configured rifle, PERIOD.
CJ