In the year 2020-21, While calculating TDS for 4th quarter i.e for the period(Jan-March) , unknowingly I had deducted TDS of a bill which pertains to April 2021 i.e next year (2021-22) 1st quarter and I included that bill while filing 4th quarter TDS of the period 2020-21.
Now should I bring that April month 2021 bill in the year 2020-21 itself although it is post period item in in my books or any other alternative?