No, you need to send only last year of your tax return. you would have to explain to teh officer why you stayed outside of teh U.S. for more than six months. If it was only one time, four years ago, I do not think it will be a problem.
Elkhalil Law Firm, LLC
Disclaimer: This answer is for informational and educational use only. This answer does not create attorney-client relationship. For more details, I recommend a private consultation with an immigration lawyer.
You should be prepared for the naturalization interview. Make sure you have your tax returns and tax return transcripts for the last five years. USCIS requests your transcripts to make sure that you have filed on time and to make sure that you don't have any unpaid tax obligations. If you don't have this information at the interview, it could delay the naturalization process.
Be sure that you know the exact dates that you were not in the United States as you may be questioned about your absence.
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J Charles Ferrari
Eng & Nishimura
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