Another person posted this comment: "I don't feel lucky in MD. Their retroactive law also exempted assorted state and local COVID relief grants from MD tax. They have to modify the forms to allow for this subtraction."

So, that might cause other States to follow. My State Legislature only meets every other year, but they are in session right now, so anything could happen, still.

"Do you think this will be for 2020 or 2021? So, there may be a lot of amended returns."

Some of it is for 2020 and will simply be enacted late. But there are many things that have been retroactive to previous year when passed, too, and you are right; lots of amendments. And look at the all the stuff that is going to result in Corrected forms and amendments: The W2 Social Security deferrals, the IRA/retirement disaster distribution deferrals, for just a few.