Can I go back and look at the information on my w-2's after filing?

You can look at your W-2 entry by doing an amended return in TurboTax. That will let you back into your return so your can see your W-2 entry. Once you are done, you can cancel your amended return by using that option on your left menu bar.

You can file an amended return using TurboTax for no additional fee. You will see the option on your Home Page in TurboTax, then under Your tax returns and documents, look for an option to Amend/Change your return. You should wait until you receive your refund or the IRS has processed your return, if you sent a payment, before you amend your tax return.