Answer: Rebecca still owes $4,768.
First, let's start with her gross income of $101,640 and subtract the deductions.
101640 - 4000 - 12200 - 4090 = 81350
This is the amount of her taxable income. Now, let's multiply by her rate of 0.28 to find her tax.
0.28 x 81350 = 22778
She has to pay $22,778 in taxes, but only $18,010 was withheld. Subtract to find the remaining amount.
22778 - 18010 = 4768