In TurboTax Online, you are experiencing issues working with Schedule E and IRS form 1099-B.
If the software is acting strangely, you may want to close out the software and clear your cache and cookies. See this TurboTax Help.
You may also want to re-boot your computer. In addition, some customers have had luck with using a different browser to access TurboTax Online.
Review these edit functions for the IRS form 1099-B transactions.
At the screen Review your sales, click on the box to the left of the transaction and the Bulk Edit function becomes available.
You may also click on the pencil to the right of the transaction to edit the transaction.
If these functions are not available to you. click the trashcan delete to the right to delete the transaction and re-enter the transaction correctly.