2020 Amendment due to Unemployment changes

I just found out that

 

The first $10,200 of unemployment payments are now tax-free for households with an annual income under $150,000 and I have already filed and rec'd refund for Federal but owe the State - can I still Amend, which I believe will change my Taxes for the better.

 

I need a 1040X form which appears may be available on March 25, 2021, should I wait for more IRS info to come?