Can I change imported cost basis on a sold common stock

Here's the steps to change a stock Cost Basis from Expert @JamesG1:

In TurboTax Online, follow these steps to remove or edit an investment sale transaction.

• Down the left side of the screen, click on Federal.
• Down the left side of the screen, click on Wages & Income.
• Scroll down to Investments and Savings and click the down arrow to the right.
• Click Start / Revisit to the right of Stocks, Cryptocurrency, Mutual Funds, Bonds, Other.
• At the screen Let's finish pulling in your investment income, click the down arrow to the right of the 1099-B investment.
• The Edit and delete trashcan become visible.
• To edit or delete an individual line within the IRS form 1099-B entry, select Edit.  Individual lines become available.  
•      Bulk Edit may be available by clicking the box to the left of the line.
•      The pencil icon is used for editing the line.
•      The trashcan delete icon is used to remove that line.

In TurboTax Desktop Premier version, follow these steps to remove or edit an investment sale transaction.

• Select Federal Taxes.
• Select  Wages & Income.
• Select I'll choose what I work on.
• Scroll down to Investment Income.
• Select Start / update to the right of Stocks, Mutual Funds, Bonds, Other.
• At the screen Your investment sales summary, the Edit button and delete trashcan are found to the right.

@chrisjmeehan