When it comes down to "ethics", its most best to do so, yes.

I agree with Karen. It's best to have IRB approval in place. Most journals would assess that before acceptance

Dear Manisha ,

Yes, It is best to have it prior to submission.

Thank you for answering it. I had a word with my coordinator of University, she told me that we don't require in quantitative paper. Is it still good to ask her to give me?

It is very important to get IRB approval ethically as well as for publication process.