Mrs. NM received a letter from the IRS asking her to submit written substantiation of a $1,500 charitable contribution deduction. Discuss the probable tax consequences to Mrs. NM if:
a. She sends the IRS copies of her canceled check for $1,500 made out to the charitable organization and the thank-you letter in which the organization acknowledged her contribution.
b. She ignores the IRS request because she has no substantiation.