General. The amount of an underpayment or overpayment is the difference between the amount you are paid and the amount you are due for a given period. An underpayment or overpayment period begins with the first month for which there is a difference between the amount paid and the amount actually due for that month. The period ends with the month in which we make the initial determination of the overpayment or underpayment. With respect to the period established, there can be no underpayment to you if we paid you more than the correct amount of SVB, even though we waived recovery of any overpayment to you for that period under the provisions of
§§ 408.910 through 408.914. A later initial determination of an overpayment will require no change with respect to a prior determination of overpayment or to the period relating to such prior determination to the extent that the basis of the prior overpayment remains the same.