Income tax for a cheque amount credited in the fy 2017-18

I received a cheque for Rs 20000 in February 2016 from my employer Govt of India. But I presented it in my bank in april 2017 and this amount was credited in my account in April 2017. In my 26as statement this amount of Rs.20000 is seen with transaction date 31-1-2017 and booking date as 25th May 2017 with TDS indicated as zero. In this situation do i need to pay income tax for this amount now by challan 280 and show it in return for Financial year 2016-17 when it was credited in my bank account in april 2017? Request advice from experts.