When: The update will occur as soon as possible. If you have not yet filed, wait for this update to be evidenced by watching the Refund Tracker to be increased as @xmasbaby0 states. If you have already filed, do not worry. The IRS will recalculate the tax balance and refund any portion due.
How: The IRS intends to work with tax software companies to add an additional worksheet.
See: IRS Statement - American Rescue Plan Act of 2021
New Exclusion of up to $10,200 of Unemployment Compensation
