SoJo - I was with H&R Block for several years, and they taught us that a mileage log can be reconstructed if you have source data. I believe if you check the IRS.gov site you will find this is correct. This being the case, you would be eligible to reconstruct the mileage log from your shopping records and file an amended return, which should get you a nice refund. If you can't find this info on the IRS.gov site, shoot me a PM and I'll search for it. You should find it under the instructions for vehicle expenses in regard to Schedule C.
Mary Davis Nowell. Based close to Fort Worth. Shopping Interstate 20 east and west, Interstate 35 north and south.