While you don't have to report Roth IRA contributions on your taxes, you might have been eligible for a credit for tax year 2002. See this link to get started:
http://www.irs.gov/newsroom/article/0,,id=...=107686,00.htmlIf eligible (at least 18 as of 12/31/02, not a student, you cannot be claimed as a dependent on anyone else's taxes, and income limits apply) it will almost surely be worth your (or your Dad's) time to file an amended return to get the benefits of the credit.