RobertB4444
Expert Alumni

Get your taxes done using TurboTax

If you are filing an 8453 it is because the information about your cost basis and transactions was not submitted to the IRS by your brokerage.  They gave it to you on the 1099, they just didn't give it to the IRS. So submitting the 1099-B is the proof that you need to show that your return is correct.

 

@MauryM 

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