After you file

You'll need to file a Schedule X (formerly 540X) to amend the CA 540 Resident return to a 540NR return.

Amended return forms & instructions for CA return.
1. Schedule X instructions tell you how to fill out Schedule X form to amend the resident return- <a rel="nofollow" target="_blank" href="https://www.ftb.ca.gov/forms/2017/17_schxins.pdf">https://www.ftb.ca.gov/forms/2017/17_schxins.pdf</...>
2. Schedule X form for you to fill out and attach to your new 540NR that you'll file with CA - <a rel="nofollow" target="_blank" href="https://www.ftb.ca.gov/forms/2017/17_schx.pdf">https://www.ftb.ca.gov/forms/2017/17_schx.pdf</a>

3. 540NR Instructions and Forms - <a rel="nofollow" target="_blank" href="https://www.ftb.ca.gov/forms/2017/17_540nrbk.pdf">https://www.ftb.ca.gov/forms/2017/17_540nrbk.pdf</...>
And you'll find both the long form 540NR and short form 540NR at this link. You will need to fill out the one that fits your tax situation and you can distinguish between the long form and short form 540NR with information listed here <a rel="nofollow" target="_blank" href="https://www.ftb.ca.gov/forms/Which-Form-Should-I-File.shtml">https://www.ftb.ca.gov/forms/Which-Form...> under the "Nonresidents or Part-Year Residents" section on that page.

Once you've distinguished which 540NR you need to fill out, you will complete it and attach the completed Schedule X to it as well and send them both to address listed on the bottom of the Schedule X instructions page.

When you use Sprintax to prepare the correct federal and state returns, you will still have to print and mail them; as nonresident returns can't be e-filed. So you can either complete the amended CA return by hand with the forms provided below or you can use Sprintax to prepare it and then attach to the Schedule X you'll need to complete provided here.