Yes, you can Amend through TurboTax.
Since you have already filed your returns and they have been Accepted, you need to wait until the IRS fully processes your return and you receive your refund.
Then, you can Amend your Tax Return by filing Form 1040-X to include your correct Form W2 information.
You can click here for instructions on Amending your tax return:
How to Change a Tax Return You Already Filed.
