You do not need to do anything.
The IRS is allowed to correct calculation errors. Taxpayers who have not yet filed will need to complete an additional worksheet which is not yet available.
For more information, see: How do I get the new unemployment benefits if I’ve already filed my taxes?
New Exclusion of up to $10,200 of Unemployment Compensation | Internal Revenue Service
[Edited 03/16/2021 | 12:23 PM PST]
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