You can make changes to the spelling of your name before you actually forward it to the IRS.
To change your info in TurboTax Online before filing, follow the steps below:
1. Sign into your Online account.
2. Click the button that says "Take me to my return".
3. On the left navigation panel select "My Info" or any other section that you wish to revise. To edit the information click on the pencil icon next to the appropriate section.
4. Begin editing each section that you need to until the return is ready to be filed.
Please see the FAQ below for more information:
https://ttlc.intuit.com/community/after-you-file/discussion/want-make-changes-before-filing/00/570626