If this is related to self-employed expenses, here are the steps:
If you have not filed-
- Sign back into the program and select Take me to my return
- At the right upper corner, in the search box, type in car expenses, business use and Enter
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Select Jump to car expenses, business use
- Follow prompts
If this is employee-related, it is not worth entering it as Congress has suspended the entire section of the miscellaneous deduction subject to 2% of AGI including the miles.