TDS on interest for 2 years

A user is experiencing a higher tax liability because TDS was deducted on two years' worth of interest paid together, with both years appearing as income in the current year's 26AS. The user is seeking a way to segregate the interest income across the two years to reduce their tax burden. Suggestions include asking the deductor to rectify their TDS return to bifurcate the interest by financial year, as interest should ideally be accounted for on an accrual basis.