After you file

Yes, "Form 5405 Repayment of the First-Time Homebuyer Credit" can be changed by going back through the interview steps for the form. To do this:

1. Sign in to your TurboTax return
2. Click "Take me to my return"
3. On the upper right side of your TurboTax online account click "search"
4. Type "homebuyer credit"
5. You will see an option to "Jump to homebuyer credit"

You can go back through the questions to correct anything you need. (See attached screenshots)