Maternity pay received in lump sum can be treated as arrears

Hi Good Evening ,

Maternity pay received in one lump sum in two different financial years, Pay was pertaining to the fy 2017-18 and received in the fy 2018-19 and the company has charged the tax in the fy 2018-19

Can the maternity pay received in the fy 2018-19 pertaining to the fy 2017-18 can be treated as arrears and claim relief u/s 89

Please revert