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.Make payment at least 5-7 days before the due date to allow enough time for processing. Payments to Students must have a pre-approval form (see Accounting Services) submitted with all of the following: Direct Payment Request (DPR) For help with billing and customers accounts. Calculate Your Support: How much could your support be? Whether online or in person, there are many ways to pay your SMUD bill. Online Sign in Customize your payment options with My Account.