Can i file GST Return ourself?

Because u r consultant and ca don't want to loose income

You can file yourself, but first fully prepare before filing return, bcos once filed return cant be revised

Yes, u can file GST returns by knowing Gst provisions. There are lot of issues which u should have proper knowledge like availability of Input tax credit, Gst applicability on supply etc. Its recommendable that u may consider to outsourse ur Gst compliance work as u are not aware of Gst laws. U will able to focus on ur core business rather than involving himself in Gst related areas. U are thinking that u will save lots of money by not paying to C.A, But practically I'm saying u will loose money if u do any mistakes by paying Interest, late fees etc.

Ok Sir, Thanks 

You can always do everything yourself..
You can also become your own doctor when you fall ill..
You can also construct your house yourself...
nothing is impossible..

likewise you can definitely file your GST Returns yourself,
but then there won't be anyone whom you can blame for the loss incurred by you because GST has not come out of nowhere.. It contains so many sections, so many provisions, interpretations and ample number of changes every now and then... we need to spare part of our lives to get hands on it..