Schedule cfl date of filing

For FY 2015-16, I had reported Rs 3000 as STCL (Short Term Capital Loss) that had arised out of sale of MF units.

For FY 2016-17, form ITR2, I want to use that Rs 3000 loss to setoff against STCG that have arised out of sale of shares.

In Schedule CFL of ITR2 this year, how should I enter the above information?

Eg in the row FY 2016-17 what should be entered as Date of Filing? What is Date of Filing? Filing of the loss?