ITR Filing Question

I was residing outside India from 2007 to 2020 and moved to India in August 2020. I have taxable income in India for FY 2020-21. I am aware that since I qualify for RNOR status any income generated outside India will not be taxed in India for upto 3 financial years. What I want to know in particular is:

1. Am I required to file an income tax return in India for FY 2020-21?

2. If yes to the question above, which form (ITR1, ITR2, etc) do I need to file?