deficit in prior payments In the case of any modification of the monthly advance amount under subparagraph (A), the Secretary may adjust the amount of any monthly payment made after the date of such modification to properly take into account the amount by which any monthly payment made before such date was greater than or less than the amount that such payment would have been on the basis of the monthly advance amount as so modified. . (3) On-line information portal Subsection (c) of section 7527A of such Code is amended to read as follows: (c) On-Line information portal (1) In general The Secretary shall establish an on-line portal which allows taxpayers to— (A) subject to such restrictions as the Secretary may provide, elect to begin or cease receiving payments under this section, and (B) provide information to the Secretary which is relevant in determining the monthly advance amount (or any modification under subsection (b)(3)(B) of such monthly advance amount) and the taxpayer’s eligibility for payments under this section, including information regarding— (i) the number of the taxpayer’s qualifying children, including a child born during the taxable year, (ii) the taxpayer’s marital status, (iii) the taxpayer’s modified adjusted gross income, (iv) the taxpayer’s principal place of abode, and (v) any other factor which the Secretary may provide. (2) Availability in multiple languages The Secretary shall ensure that the on-line portal described in paragraph (1) is available in multiple languages. . (4) Application of advance payments in possessions (A) Puerto Rico Subparagraph (A) of section 7527A(e)(4) of such Code is amended to read as follows: (A) Puerto Rico (i) For application of child tax credit to residents of Puerto Rico, see section 24(d). (ii) For application of monthly advance payments to residents of Puerto Rico, see subsection (b)(1)(A). . (B) Conforming amendments Subparagraph (C) of section 7527A(e)(4) of such Code is amended by striking with respect to taxable years beginning in 2021 both