If your are in your Turbo Tax account and in your TIMELINE, click back on the FEDERAL portion and access your INCOME AND WAGES, If you have not already submitted or fully filed your return, it will allow you to make that correction by EDIT and changing the information. The information would be located on the W2 in question. This is only if you have not yet filed. If you did submit and e-filed, no changes can be made. You would need to amend your return and mail it in with the correction.
I hope this helps.