@ravileos this happens quite frequently and 1099 data is often wrong. It will not raise any red flags with the IRS. You may ask your broker to issue a new 1099 but, they probably won't.
If you type the 1099-b in yourself which I always highly suggest, after entering there will be a screen "select any less common adjustments that apply"
You will choose both
"the reported holding period (Short term) is incorrect" and
"The cost basis on my statement is incorrect" where a box will allow you to enter the correct cost basis.
Or if you imported them:
- On the Review your sales screen, select the pencil icon next to one of your sales
- You may not see this screen if you chose to enter your 1099-B another way
- On the Now, enter one sale on your 1099-B screen, check the box next to The cost basis is incorrect or missing on my 1099-B and select Continue
- On the Let us know if any of these situations apply to this sale screen, check the box next to None of these apply and select Continue
- On the We noticed there's an issue with your cost basis… screen, select I know my cost basis and need to make an adjustment and enter the amount
- You can find your adjusted cost basis on a supplemental form provided by your financial institution. It’s usually available by mid-February along with Form 1099-B
- Select Continue
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