I have an extension of time to file my return. Why did I get a penalty?
An extension of time to file is not an extension of time to pay the taxes you owe. If we sent you a notice showing a penalty for Failure to Pay the Tax Shown on a Return by the Due Date, we imposed an underpayment penalty for not paying your taxes by April 18, 2018.
The penalty is 5 percent of the unpaid tax plus 1/2 of 1 percent each month, or part of a month the tax remains unpaid, not to exceed 40 months. The maximum penalty is 25 percent of the total unpaid tax. The penalty is imposed regardless of an extension of time to file.
If we sent you a notice showing a penalty for Underpayment of Estimated Tax, we have not received your required estimated tax payments. We require you to prepay your tax through withholding from your wages or by prepaying your estimated tax in four equal installments totaling either 100 percent of your prior year's tax or 90 percent of your current year's tax.
We impose an Underpayment of Estimated Tax Penalty on the amount of tax underpaid from the date the installment was due to the date the installment was paid or the date the return was due, whichever is earlier. We compute the penalty at the same rate as interest for the period of underpayment.
If you based your installments on annualized income, please complete FTB 5805, Underpayment of Estimated Tax by Individuals and Fiduciaries (FTB 5805 Instructions) and return it to our office with a copy of the notice you received.
If your notice shows a penalty for Failure to File a Return by the Due Date, you were charged a delinquency penalty because we did not receive your return by the due date.
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Last Updated: 04.18.2018