There is no Box 1c. Should that be 2a - Capital Gain Distributions? Those are short term capital gains from mutual funds. If that's the case you have $12,073 in dividend/cap gain distributions. If you paid an addition al $2,822 in tax on that income, that's 23%. But the additional tax amount may not be accurate. There are a lot of moving parts to a tax return when it comes to determining the total tax.