California estimated tax first year retired (2025)

[user68564]

How can I use TurboTax to calculate my 2025 California estimated tax payments when my circumstances will be significantly different from 2024? I will have reduced income overall, and even more reduced California income due to being a part-year resident in 2025. All my earned income will be in (or from) California (first part of year), but only some of my passive income will be while living in California.  Should I duplicate my 2024 file, and then modify it with my projected national income, and change California to part-year (and pro-rate), and see what TT generates? Is that the best approach? 

[Bsch4477]

That will work but be sure to save the test return with a different name from your original one.