Do i need receipts for the "required materials" deduction in the Lifetime Learning Credit? Turbotax doesn't require. Will i receive a letter from IRS requesting proof?

Will I be required to submit receipts or proof of purchase for the "required materials" deductions used in the Lifetime Learning Credit? The Lifetime Learning Credit allows you to deduct 20% of up to $10,000. I purchased around $3800 in required materials. There are a handful of receipts. Turbotax does not require you to submit proof. Does the IRS require proof? Will i receive a follow up letter requesting receipts?"