I have already filed my 2023 federal taxes and received a return. I e-filed the federal and I have to mail the state. However, I still need to mail my state taxes for California, they were completed and printed, and I am unable now to make changes to them. After completing my federal taxes, I realized that I needed to change my status from 'single' to 'registered domestic partner.' I used an online tool that led me to download software because, in California, registered domestic partners are required to file three federal returns, according to the Turbo Tax website. However, after downloading the software, I am unable to locate my 2023 taxes to amend. Is it too soon to amend them?
Also, why do registered domestic partners need to file three federal returns if we are filing separately?
Thank you.
