Ladyvwj. The first time I called, the operator did not want to send me a status letter because I was already resgistered. So I spoke to her supervisor and explained to him that, immigration N-400 may required me to show some sort of prove. He was kind enough to re-send my selective letter, with the card (paper cut out) which you would've originally recieve when you first signed up. It took a while but I eventually recieved it.. I forgot how long though. I don't want to take Any chances since my entire App was pretty straight forward with no bad morals / wrong doings. I figures the IO will ask for something just to create some sort of work. Got all my tax transcripts as well for the past 10 years. only 3 years back from online. The older ones, I had to pay the local IRS office a small fee to obtain it.