Sentence:  You must attach a statement to your return , if you take advantage of this automatic extension , showing that you were in Alaska or were outside the <WSD>United</WSD> States or Puerto Rico on April 15 or other due date . 
Meaning of the word marked with <WSD> tags:  North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776