Myself can we fill gst return every month.

Yes, you can file your returns yourself.

But i would say that filing returns is not a big issue but where to fill and what to fill is crucial.

So, if you have the requisite knowledge of the Act, then please go ahead.

As far as process is concerned, there are various tutorials available online, on gst portal as well as on other websites and youtube. You can see them once.

Yes, you can do it yourself... but try it after learning the basics of GST law, and keep yourself updated with changes in the law, else you won't be able to comply and end up paying late fees, interests, penalties etc..

It's always better to outsource the legal work and focus on business.. you'll earn more by spending equal amount of time to your business rather than learning the law and saving on compliance cost...

Any one can file GST Return only if they have good and deep knowledge of GST Act and Rules.

Yes you can............