If you already filed your 2020 tax return and paid tax on unemployment compensation that qualifies for the tax break, in most cases, there is no need to file an amended return.
Taxpayers should only file an amended return if the calculations make the taxpayer newly eligible for additional federal credits and deductions not already included on the original tax return.
Taxpayers may want to review their state tax returns as well. The IRS will determine the correct taxable amount of unemployment compensation and tax. If there is any overpayment of tax, it will be either refunded or applied to other outstanding taxes owed.
The recalculations will take place in two phases; single filers and other taxpayers eligible for the up to $10,200 exclusion, followed by married filing jointly taxpayers eligible for the up to $20,400 exclusion and others with more complex returns.