IRS form 2106 is not restricted to military use only. See the form at https://www.irs.gov/pub/irs-pdf/f2106.pdf It pertains to employee business expenses for for use only by Armed Forces reservists, qualified performing artists, fee-basis state or local government officials, and employees with impairment-related work expenses. Perhaps you indicated you qualify based on one or more of the other three uses of this form?
