@bbackues Sorry haven't done one in quite a while. You do put on schedule A after you fill out the 1098C. in the how valued question I answer "present value" Did a mock 1098C, and put on schedule A. Got no errors. Following are instructions from IRS.

Instructions for Donor Caution: You must attach Copy B of Form 1098-C to your income tax return in order to take a deduction for the contribution of a qualified vehicle with a claimed value of more than $500. (If you e-file your return, you must (a) attach Copy B of Form 1098-C to Form 8453 and mail the forms to the IRS, or (b) include Form 1098-C as a PDF attachment if your software program permits.) If you do not attach Copy B of Form 1098-C to your return (or to Form 8453) when required, the IRS will disallow your deduction. Generally, you must also attach Form 8283, Noncash Charitable Contributions, if the amount you deduct for all noncash gifts is more than $500. See the Instructions for Form 8283 for exceptions.