Unclaimed TDS credit

Nishant (Student ) (32 Points)

04 June 2020  
For A.Y. 2018-19, I forgot to claim tds credit of Rs. 1,00,000 reflecting in form 26AS but income for the same was included in calculation of tax liability. Therefore I paid an extra 1 lac rupees as tax.
Now revised return date has also passed.
What other remedy I have? Please tell me.