1099-NEC doesn't include mileage reimbursement

[bman92]

I was paid for mileage reimbursement from my contractor job, but that reimbursement was not included on the 1099-NEC. Do I need to add this for income, if so, where?

[LeticiaF1]

Yes, you will need to report what you received for mileage reimbursement as income even if it was not reported on your 1099-NEC.  Include this income as a cash or other payment when you are entering your information in TurboTax.  You will also be able to deduct all of your vehicle expense as a business expense. 

How do I report income from self-employment?

How do I claim vehicle expenses for my business or rental?

IRS Publication 334

[AmeliesUncle]

Was it something you submitted to the client and they reimbursed you at the Standard Mileage Rate?

If so, no, it is not reported as income.  But you also don't claim the vehicle expense for that.