I absolutelly agree with Raul and N400.....Do not pay $39....
Ask for tax transcripts only (they are free) and usually arrive in 4-5 days. Interestingly, IRS claims it will take them 2 weeks to deliver. So, I guess they always overachive
Keep in mind that Tax Transcripts are only available for the last 3 yrs. Beyond that point, you will have to bring your copies or (god forbid) if you do not have them......then you will really have to fork out $39 and hope that IRS has your file in good order. However, 95% probaility....I do not think this is the case with you. Correct me if I'm wrong...
So, relax....this is should be an easy excercise....
UNDER THE ASSUMPTION that your case is straightforward and that you
do not have fishy things in your N-400 application: suspicious marriage, long absences from US, weak links with US etc.
I brought tax transcripts and copies of my tax filings with me at the interview. I did not show them since I was not asked to produce any of them nor my IO really cared about it. This is because my case was 100% straightforward and he did not want to waste his time.
All these "tax papers" were just serving as my back-up. All in all my interview was very short and fast. Keep in mind that it is not unreasonable for IO officer to ask you to produce for example Form2555 (foreign earned income) if you claimed that deduction and officer has some doubts about your residence. Also, some people are even asked to produce their state tax returns and prove that they never filed their income tax (either state or federal) as non-residents.
My philosophy was that I rather be 100% prepared for any eventuality to deal during the interview than handling with post-interview sumbissions or explanations.
In my case, it paid 300%....I was worried about nothing...had a great case...and smooth interview.
While there are some general rules and guidances....It all depends on your case.
My 2c.....