Deductions & credits

Can insurance premiums be added to medical expenses that are deducted from your paycheck? Does this include medical, dental, and vision?

to answer the second question first - yes but see the answer to the first question. 

 

are you entitled to take a medical expense deduction - maybe yes maybe no. even though deducted from your paycheck, your employer may have an employee benefit plan so that your taxable wages line 1 of your W-2 are reduced for the amount deducted. thus you have already gotten a deduction. so no double dipping.  if you don't know the answer to this ask your employer.