Did you file your return already?
If you have already filed, and there are sizeable changes on the corrected Form 1099-B, then you will have to file an amended return. Compare the two forms and see what entries have changed in the corrected version. The new information will have a "C" besides what is corrected. If the differences aren't very big and they often are minor amounts, then there may not be a change in your tax liability.
Here are the 2020 IRS Tax Table. You can check if your tax liability will change with the new amounts.
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