Wikipedia:Articles for deletion/Form 1040 (2nd nomination)
As the subject of multiple entire books https://books.google.com/books?id=VpVGAd7TknkC https://books.google.com/books?id=9mGRlRYMBMAC https://books.google.com/books?id=8gOGnOtVrhYC https://books.google.com/books?id=yNUgc0RxbqgC (all four of these are independent of the US government, reliably published, with the 1040 in their titles) it is obviously notable per 
— User:David, 21:29, 29 July 2016 (UTC)
Stance: keep
Cited policy: WP:GNG (Wikipedia:Notability)