Payments may be mailed, made online, or made or in person at the Sacramento County Tax Collector's Office located at 700 H Street, Suite 1710. The due date to file your California state tax return and pay 5 any balance due is April 15, 2025.Payments are due no later than December 11, 2023. Late payments will incur a 10 percent penalty for each tax bill. This gives you until October 15 to file without penalties. You can change your payment due date within the same month on all closed-end loans.