Query ragarding foreign tax credit

Hello expert team

I have filed belated IT return of infosys employee who is getting salary income in india and also from USA for AY 2017-18 and in form 16 they also specified foreign tax credit .

i filed ITR 2 since in ITR 1 there is no information ragarding claim of foreign tax credit  but i did'nt file form 67 where as per Income Tax Rule 128, introduced from 01-04-2017, if a claim of foreign tax credit is being made in return, the Form 67 is requierd to be furnished on or before the due date specified for furnishing return of income under sub-section (1) of section 139.

Therefore  my query  is... actually i have to get refund in AY 2017-18 where i filed belated return and also  i did'nt file form 67  and return is transferred to AO . 

Now Can i file belated Form 67  in order to claim  foreign tax credit  or do i need to visit AO for claim of credit .

Thank you