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How do I amend a prior-year state return?

Amending a 2017, 2016, or 2015 state return is very similar to amending a prior-year federal return. Here are some tips:

  • Be sure to download and install the appropriate state software.
    • For example, to amend your 2017 California return, download and install the 2017 TurboTax California state software.
    • The amendment software that we offer to prior-year TurboTax Online customers includes 1 free state download. Contact us if you need to download additional states that you paid for when you originally filed.
  • TurboTax state programs vary in amendment instructions, but you'll either find the amendment option at the beginning or close to the end.
  • The state program doesn't function as a standalone product. Even if you only need to amend your state return (not the federal), install the federal program for the corresponding tax year.
  • If the change originates on the federal return (for example, you need to add or change your W-2 information), amend your federal return before amending your state. This carries the information over into your state return.

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