Section 19145 Of Article 7. Penalties And Additions To Tax From California Revenue And Taxation Code >> Division 2. >> Part 10.2. >> Chapter 4. >> Article 7.
19145
. For purposes of Section 19142, the period of the
underpayment shall run from the date the installment was required to
be made to whichever of the following dates is the earlier:
(a) The 15th day of the third month following the close of the
taxable year, except in the case of an organization described in
Section 23731 subject to the tax imposed under Section 23731, in
which case "fifth" shall be substituted for "third."
(b) With respect to any portion of the underpayment, the date on
which that portion is paid. For purposes of this subdivision, a
payment of estimated tax on any installment date shall be considered
a payment of any previous underpayment only to the extent the payment
exceeds the amount of the installment determined under subdivision
(a) of Section 19144 for the installment date.