Julie, being self-employed, is required to make estimated payments of her tax liability for the year. Her tax liability for 2017 was $25,000, and her AGI was less than $150,000. For 2018, Julie ultimately determines that her income tax liability is $18,000. During the year, however, she made the following payments, totaling $13,000.

Because Julie prepaid so little of her ultimate income tax liability, she now realizes that she may be subject to the penalty for underpayment of estimated tax. Determine Julies exposure to the penalty for underpayment of estimated tax. The same as part (a), except that Julies tax liability for 2017 was $15,960.

April 17, 2018 June 15, 2018 September 17, 2018 January 15, 2019 Total paid 4,500 2,800 4,100 1,600 13,000