There is no place to indicate that he is a government employee. If you are wanting to claim employee business expenses, you just enter the expenses if you qualify. The deduction is listed under the Deductions & Credits section. Scroll down the list to Employment Expenses and select Start next to Job-Related Expenses. It is limited a very few employees.
A fee-based public official is an individual who receives and retains remuneration directly from the public. An individual who receives payment for services from government funds in the form of a wage or salary is not a fee-based public official, even if the compensation is called a fee. Most government employees are not considered fee-based. This is a rare situation.
Generally, a position compensated by a salary and fees is considered a fee-basis position if the fees are the principal source of compensation unless State law provides that a position for which any salary is paid is not a fee-basis position. For more details, see https://secure.ssa.gov/poms.nsf/lnx/1960001625.