Schedule C house painter. He has estimated his business mileage, but does not keep a log, would take him too long to reconstruct, and said to just forget it. But wait, there's more...by forgoing the mileage expense, it increases his EITC. So do I include the mileage, because it was an expense, even though he does not written evidence as required? Or leave it off and increase his EITC. Not talking big money, less than $500.