It's generally not possible to file an Income Tax return for FY 2017-18 under normal provisions, as the deadline for belated returns was 31st March 2019. However, you may still be able to file if you receive a notice from the IT department or by submitting a condonation of delay request to your jurisdictional CIT. This process, under section 119(2)(b), is specifically for cases where you need to claim a refund or carry forward losses.
You may file in response to notice u/s 142(1) if notice is received from IT dept.
Else you may visit the Income Tax Officer and submit a request letter to allow ITR filing which is called condonation of delay for AY-2018-19 (FY/PY-2017-18)
No way for filling ITR for the FY 17-18 in normal provisions...
But, In case You want to claim any Refund or Carry forward loss then You can try to file Condonation delay request to Your jurisdictional CIT. The request accepted by CIT/AO then You can file with the acceptance of request...