P.R. Laws tit. 21, § 651v
Interest on the amount determined as deficiency shall be assessed at the same time as the deficiency, shall be paid upon notice and demand by the Finance Director, and shall be collected as part of the license tax, at the annual rate of ten percent (10%) from the date prescribed for the first installment of the license tax until the date on which the deficiency is assessed, or, in the case of a waiver under subsection (d) of § 651o of this title until the thirtieth day following the date of the filing of said waiver or until such day as the deficiency be assessed, whichever occurs first. If any portion of the deficiency assessed shall not be collected by reason of a previous payment of the license tax, in whole or in part, the proper adjustment shall be made with respect to the interest on said portion.
History —July 10, 1974, No. 113, Part 1, p. 371, § 23; Nov. 17, 1992, No. 93, § 16.