What can I provide as proof that my educational credits are eligible for deduction?
You can provide a copy of your 1098-T or if you have copies of your statements from the school, which should include the amount billed as well as the amount paid. You just need to provide proof that you paid for the educational credits.
For more information, here is an IRS.Gov link which provides additional information on the American Opportunity Tax Credit: https://www.irs.gov/individuals/aotc