That fax number goes to the IRS' rejection office in Kansas City. If you need to send in the form to the Federal government, then that is the right fax number. If you need to send it into your state, then it is not.
In California: To qualify for the premium tax credit, you must:
• File a federal tax return. Do this even if you don’t usually file a tax return or haven’t filed in the past.
• Send Form 8962 with your federal tax return. Do this to report the premium tax credit you got each month to the IRS. You will use your Form 1095-A to fill out Form 8962.
• File taxes as Married Filing Jointly. Do this if you’re married and live with your spouse. For exceptions, talk to your tax preparer.
You can also call Covered California at 1-800-300-1506 (TTY: 1-888-889-4500).
You can call Monday through Friday 8 a.m. to 6 p.m.
During certain times of the year, Covered California may be open Saturdays 8 a.m. to 5 p.m.