Yes, your wife's cobra health insurance premiums are deductible on Schedule A of Form 1040 as a medical expense if they are paid with after-tax dollars.
If the premiums are paid with pre-tax dollars, then no, they are not deductible.
TurboTax will guide you step-by-step to determine the correct amount of the deduction.
For more information, please refer to IRS Publication 502 - "Medical and Dental Expenses" at the following link: https://www.irs.gov/publications/p502
