Sanjay owes federal taxes in the amount of $1,500 for the current tax year. Last year Sanjay had a tax liability in the amount of $4,000; however,...

Sanjay owes federal taxes in the amount of $1,500 for the current tax year. Last year Sanjay had a tax liability in the amount of $4,000; however, his tax liability this year is $6,250. Sanjay did not realize he would owe federal taxes this year, therefore, he did not make estimated tax payments. For what reason might he owe an underpayment penalty?

a) Sanjay's underpayment of tax was more than $1,000.

b) Sanjay's tax balance due is more than 20% of his total current tax year liability.

c) Sanjay owed more than 80% of the tax shown on the 2015 return.

d) Sanjay plans to make estimated tax payments for next year.