You will have to file an amended return to add the transactions on the corrected 1099-B. If you prepared your original tax return using TurboTax, log in to your account, open the tax return you already filed, and click on the link to amend your return. From there, the software will walk you through the process of filing the amendment.
If you didn't use TurboTax to file your tax return, you can use TurboTax to prepare the amendment. However, you'll first have to enter your information into TurboTax to match what you filed the first time, then start the process of amending it.
For additional information on amending returns see the following TurboTax Help Article: How to File an Amended Tax Return with the IRS
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