For a single person, with no dependents...that looks exactly right. (I ran a test tax return)
Earn more..pay more taxes.
The SS is immaterial...only the Income taxes withheld matter.
With only a couple months of earnings last year, either:
1) Your withholding may have been set too high...so bigger refund
or, maybe more likely:
2) with the lower income last year, you may have been eligible for some EIC (Earned Income Credits...i.e. freemoney) that your higher income made you ineligible for this year.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
