How do I deduct expenses for non-accredited professional certification courses? A 1098-T does not apply.

[Hal_Al]

That's not deductible (or eligible for a credit) unless you are self employed. Even then, the education must be directly related to your business activities.

If you are a regular W-2 employee, you are no longer (effective 2018) allowed to deduct mileage and other job expenses.  Even when you were allowed to, it was only an itemized deduction subject to the 2% of AGI threshold.