From CNBC regarding the excluding of $10,200 of unemployment compensation from 2020 taxable income:
"Senate Democrats reached a compromise on Friday to narrow the scope of the enhanced unemployment benefits in the $1.9 trillion Covid-19 relief package, cutting the benefit from $400 to $300 a week but allowing the enhanced benefits to run through early October.

As part of that compromise, Democrats added language to the bill that would provide a tax waiver on up to $10,200 of unemployment insurance benefits for 2020, staff for Sen. Ron Wyden, D-Ore., confirmed Friday to CNBC Make It.
The amendment which is expected to hit the Senate floor Friday afternoon, ensures that unemployed workers will not face a surprise bill on their 2020 taxes, according to a spokeswoman for Sen. Carper."

This was reported today in The Hill as well.  I guess that means we may know something soon regarding the taxability of those benefits.  Then we'll just need the tax software companies to be able to update their programs.