State tax filing

Since you're referring to Form OR-10, it sounds like you're referring to state estimated tax payments, as opposed to withholding.  To enter your state estimated tax payment on a specific date in TurboTax Online:

  1. If you don’t see 2022 TAXES in the left pane, select the dropdown to the right of Deductions & Credits on the Hi, let’s keep working on your taxes! page and then select Let’s get startedPick up where you left off, or Review/Edit. 
    • Otherwise, in the left pane, select Federal, then Deductions & Credits
  2. Scroll down and select the dropdown to the right of Estimates and Other Taxes Paid
  3. Select  Start or Revisit to the right of Estimated Tax Payments
  4. Select  Start to the right of State estimated taxes for 2022
  5. Select  Yes on the Did you pay state estimated taxes for 2022? screen
  6. On the  How much did you pay in state estimated taxes? page, you can enter the amount paid.  Note that you can change the date paid from what's populated on the page.      Once done, select Continue

This should change (or possibly eliminate) your underpayment interest.