; and (B) be considered to be amounts required by law to be withheld. (c) Monthly payments process (1) In general The Secretary shall establish a process under which a borrower may make monthly payments towards the borrower’s annual repayment amount, at any time in the taxable year, because the borrower— (A) has opted-out of withholding under subsection (a)(10); or (B) expects to have income that is not subject to the withholding process described in subsection (b). (2) Information required The procedure for initiating the monthly payments process under paragraph (1) shall include the following: (A) Income estimate A requirement for a borrower to provide an estimate of the borrower’s income for the taxable year that will count towards the borrower’s income-based repayment obligation, excluding, in the case of a borrower subject to the withholding process, any income subject to the withholding process. (B) Amortization schedule In the case of a borrower who has opted out of the withholding process, the ability for the borrower to indicate that the borrower would like the borrower’s monthly payments set such that the borrower’s outstanding loans made under this part would be repaid within a specified number of years. (3) Monthly payments amounts The Secretary shall set the borrower’s monthly payment amount to the greater of— (A) the difference between the borrower’s annual repayment amount that would result given the income estimate provided by the borrower under paragraph (2)(A) and the payments the borrower has already made in the year towards such amount (excluding, for borrowers who have not opted-out of withholding, payments through the withholding process), divided by the remaining months in the taxable year