Instead of calling the regular Contact Us numbers, where you will get routed and re routed, it is much simpler to go directly to the FTB Directory and call the number related directly to your issue. The full list of most FTB phone numbers can be found here:
https://www.ftb.ca.gov/forms/misc/1240.pdf
Need to set up the balance due in a monthly pay back.
You can reach us at (888) 515-4829 and we can setup a call for you.