My mother has a US green card (permanent residency) and her US home is in California. However, she has lived outside USA the whole of 2021 (1/1/21 - 12/31/21).
On account of possessing a green card, she is filing her Federal tax return for 2021. Does she also have to file her California tax return?
She was also outside the USA the whole of 2020.
Thanks in advance.