If you are under age 59½ and made no other contributions to Roth IRAs, you must find and enter the amount that was converted. You can find this from the Form 8606 included with your 2013 tax return. If you don't have a copy of your 2013 tax return, this will be in the transcript of your 2013 tax return that you can obtain from the IRS:
https://www.irs.gov/individuals/get-transcript
