Here is my question regarding mileage – I’m testing this using both TaxCut and TurboTax.   In both cases, when I enter my mileage, it does not seem to reduce my tax owed. When I tell the program I want to use the home office deduction, then my mileage makes a difference. If I tell it not to do the home office deduction, then my entering mileage makes no difference. So, can I only deduct my mileage if I take the home office deduction? I haven’t read anything to indicate this, but the actions of the tax software programs leads me to believe that this is the case.

I don’t know if this matters, but I itemize my deductions (mostly due to mortgage interest & real estate taxes paid). I do not take the standard deduction.