Section 6477 Of Article 1.1. Prepayment From California Revenue And Taxation Code >> Division 2. >> Part 1. >> Chapter 5. >> Article 1.1.

. Any person required to make a prepayment pursuant to Section 6471 or Section 6471.5 who fails to make a prepayment before the last day of the monthly period following the quarterly period in which the prepayment became due and who files a timely return and payment for the quarterly period in which the prepayment became due shall pay a penalty of 6 percent of the amount equal to 90 percent of the tax liability, as prescribed in those sections, for each of the periods during that quarterly period for which a required prepayment was not made.