The information could have been wrong the first time they sent it, or it could be due to them completely forgetting. The best way to know would be to give the sender a call to ask them about it, as they are the only one who knows. You can file an amended return if you need to change or add information for a return that's been submitted already.
To File an Amended Return:
1. Wait for your return to be accepted or rejected by the IRS
2. Log into your account, and at your tax timeline select your "2015 Tax Year"
3. Select to "Amend (Change) 2015 return" and
follow the directions
https://ttlc.intuit.com/replies/3288565
To Enter Your 1099-B:
1.
Go to "Federal Taxes"
2.
Choose "Wages and Income"
3.
Select "I'll choose what I work on"
4.
Scroll down to "Investment Income", select "show more"
5.
Select "Stocks, Mutual Funds, Bonds, Other"
6.
Continue
through the interview questions until you arrive at the screen that says "Let
Us Enter Your 1099-B"
