Amending 2023, can't change state residency

[cantare]

My girlfriend mis-entered her address in TT Online, and wound up filing a CA nonresident 540NR for 2023 by mistake. 

Amending is not going well. If I grab the .2023tax file, my desktop app wants to download DC and CA for $45 each before proceeding. I already have CA installed, and don't need DC.

If I try amending online, turbotax doesn't switch to the resident CA form even when I answer the residency questions accurately. Anyone run into this before?

[MonikaK1]

In order to amend a previous years' return, that was filed using TurboTax Online:

When you first open your return and see "let's keep working on your taxes", scroll down to the section "Your tax returns and documents". If you prepared your 2023 tax return in TurboTax, in the same account, you should see "2023" listed among the documents you can select to view. If you used a different TurboTax account for 2023, you would need to log in to that account to view your return. See this help article for more information.

See this help article for filing nonresident returns. You would need to change information in the Federal return, in the Personal Info / My Info section.