From a different forum - just for perspective:

It looks like the IRS has moved very quickly. Drake is ready, not sure about the other software vendors 

Unemployment - Software Update

Tomorrow morning, a software update for the new Unemployment Compensation Exclusion Worksheet will be available, allowing you to file returns with this new exclusion.

How It Works

You will continue to enter unemployment compensation as you have been. The software will produce a worksheet to calculate the exclusion amount, and that amount will carry to Form 1040, Schedule 1, Line 8 in accordance with IRS instructions.

Returns Previously Filed with Unemployment Compensation

The IRS strongly recommends that tax preparers and taxpayers should not yet file amended returns for the Unemployment Exclusion. Official IRS guidance is forthcoming.