First, let me say that form 2106 is not scheduled to be made available until 2/3/2021. Thus, results are unpredictable right now because the necessary changes in the form and software and the associated testing have not been made yet. Please follow this link to see the Availability of the form.
I just did a test using the current Online system, and after answering all the questions for a reservist's expenses, the amount I was allowed appeared on line 12 on Schedule 1 (1040) as an adjustment (i.e., subtraction) to gross income.
So I would encourage you to go through the interview in TurboTax again to make sure that you answered all the questions, specifically that you are an Army Reservist. Under Deductions & Credits, click on "Job Expenses for W-2 Income" and proceed through the interview. Tell us what happens when you do that.
I see that the interview assumes that all travel is by car; let's see if the updated interview on or about 2/3/2021 changes that. For the time being, you can put the airfare into parking and tolls. It will be line 2 instead of line 3on the 2106, but the final numbers should be the same.
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