ITC CLAIM OF FY 2017-18

As per Section 16(4), Time Limit for Claiming Input Tax Credit In respect of Any Invoice or debit note pertaning to invoice 

(a) Due date of furnishing of return for the month of september of succeeding financial year under section 39 [i.e. 20th octomber]

(b) Due date of Furnishing Annual Return 

Whichever is earlier.

In this case, you are not eligible for Claiming Input tax credit for Financial year 2017 - 2018 & 2018 - 2019.