Based on your numbers, no your benefits are not taxable.
$33,780/2 + $8000 = $24,890 which is less than $25,000 filing as Single.
Up to 85% of Social Security Retirement/Disability/Survivors benefits becomes taxable when all your other income plus 1/2 your social security reaches:
- Married Filing Jointly - $32,000
- Single or Head of Household - $25,000
- Married Filing Separately - 0
