I document my personal calls by marking them on my cell phone bill or statement from UIT. Isn’t that enough substantiation?
You would think so. But, under IRS authority it is not enough to mark personal calls and say that all the rest are business calls. IRS substantiation requirements include the “amount of each separate expenditure, the amount of business/investment use, the date of the expenditure or use, and the business or investment purpose.” And . . .
