Can dental bills be deducted on income tax return?

Yes, if you itemize deductions on Form 1040 Schedule A, but the deduction may be limited to zero if your adjusted gross income (AGI) is high and your deductible expenses are low.

For example, if your AGI is $40,000 and your medical and dental expenses are $4,000, your deduction will be limited to $1,000: $40,000 AGI x 7.5% = $3,000 threshold. $4,000 expenses minus $3,000 threshold = $1,000 deduction.

See the attached link for a list of expenses that qualify for the medical and dental expense deduction.