TurboTax will only calculate the forms based upon the answers in the interview portion of the screen. Form 8995 is for the Qualified Business Income tax deduction and would typically be an option for returns filed with self-employment income or other business activity.
I recommend reviewing the return as already prepared in TurboTax to ensure the return was prepared correctly. Please see this link to confirm the W-2 form was entered correctly. For any tips reported on your son's W-2 form, if anything, a Form 4137 would be generated to pay taxes on any unreported tips.
If you notice a difference while reviewing the input, and determine the return was prepared incorrectly, refer to the instructions on the IRS letter. If you are directed to amend the return, please follow the instructions here.
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