Here's how to get back to the entries that carry over to Form 2210 Underpayment of Estimated Tax by Individuals, Estates, and Trusts:
- Sign into your TurboTax Premier online account.
- Select "Take me to my return"
- On the left click on "Federal", and "Other Tax Situations" at the top
- Under "Additional Tax Payments" select "Underpayment Penalties"
- Select "revisit" to go through and change your numbers