TT miscalculating tax due of $9349 on a taxable income of just $2139. Help!

Preparing tax return for my teen aged daughter. TT is calculating a tax due of $9349 on taxable income of just $2139. How can that be? Have gone over all inputs multiple times for accuracy. Can't figure out what is going so wrong?? 
Total income: $6537
Deductions: -$4398
Taxes:  $9355 

Just prepared sim return for my son and everything was fine and rational with a tax due of $0 on sim income.