thanks Rainman.
I don't think my original question was too clear, it looks like the "special standard meal allowance for transportation workers" does apply to me. I am a pilot based in my home location, on call, so most days I fly outside this location and I am not reimbursed meal expenses.
So my next question would be, can I go back and amend 2016 & 2017 to add this and if so how can I find the amount allowed for previous years (I have the rate for 2018)?
