So in looking through my "for my records" worksheets, etc. I see depreciation (<$1000/yr), but i don't see it in the filed documents. So perhaps that amount was low enough that it didn't have an effect on the taxes?
As an example, in 2017, I see "Employee Home Office Worksheet" Form 2106, where i have calculated in line 38 "Depreciation of your home" of $878. That's included in "Allowable expenses for business use of your home" amount on the same section. However, looking at the docs filed as part of my 2017 return, I only have 1040, Sch A, Sch C, and Form 2106, but the form 2106 filed only includes part 1, 2, 3 - vehicle expenses, no mention of home office.
