—Is there anything else anyone can think of that I may need?—
Other than a cyanide capsule, I think you have it covered.
When I did it, I kept a mileage log of every single trip (and its purpose) in an excel spreadsheet and let it sum the miles. I use the 1040 short form now. :-D
Your records sound too good to be believed, LOL It should be OK. I just keep a dog-eared hand-written diary in the car for mileage and the service records and gas receipts in an envelope, which can always be cross-checked against my credit card trail. Maybe going to the short form set off the alarm
“Other than a cyanide capsule, I think you have it covered.”
Would that be for me or the IRS agent?
Take only the documents that deal with the question. Don’t volunteer any other info. Be friendly.
What you really need is a list of jobs and the mileage round trip to each job. If you can document hat and understated your mileage ask for a refund. That will frost them.