Generally, the property tax rate in California is 1% of the purchase price and payments are made twice per year. Howerver, Suisun City is part of Solano County so....

Check here: https://www.solanocounty.com/depts/ttcc/tax_collector/info.asp

And here: https://www.solanocounty.com/depts/ttcc/tax_collector/faq.asp

And...Who should I contact if I have a question not listed here?
1. For questions about the tax collection process, tax penalties, or delinquent taxes please contact our office at 707-784-7485.

2. For questions about special assessments, corrected bills, or property tax rates please call the Solano County Auditor at 707-784-6283.

3. For questions about supplemental assessments, appraisals, property values, changes in property values, changes in ownership, assessment appeals, changing your mailing address, or filing a homeowners exemption please call the Solano County Assessor's office at 707-784-6200.

In Arizona it is Sept and March. Might be the same in CA