How do I correct last name spelling when forms are finished. I am 90 years old and blind in one eye. Your print is very small my last name has last letter wrong??

If you have electronically filed your return and it has been accepted by the IRS, do not worry about making the correction for your 2019 return.  If the return is rejected by the IRS, then you can edit your personal information and correct your name before resubmitting your return to the IRS.

If you have printed your return to be mailed, then you can go back into the return to make the change and print it again.  

In order to get back into your return to make changes, you will need to indicate that you are trying to Add a State.  This will open up the return again so that you can edit it.  

The step by step instructions are in the following TurboTax article, just stop after step 4 and make your changes:

How do I change from mail to e-file in TurboTax Online?

@jmdechristophet