How to claim gst collected by flipkart from the seller

Hi All,

my client is a flipkart seller and he sells mobile cases on flipkart. Assume he sold one case for Rs.289(IGST @ 18% = 44.09 and Taxable value = 244.91) and now flipkart shall collect Rs.289 from the customer and after deducting Rs.(40+15+65+10) = 130+ GST @ 18% = 23 i.e total 153 remits the remaining amount Rs.136 to the clients bank account.

now my query is whether Rs.23 input GST can be set off against output GST Rs.44?

if yes, how to claim as in the GST website -- dashboard ..under eligible ITC the amount is showing Rs.0 and there is no option to enter it manually..

Any help is highly appreciated..:)