Spidell’s California Taxletter®
Spidell’s California Taxletter® is a monthly newsletter plus a searchable online archive of back issues that keeps you ahead of California tax changes so they don’t take you by surprise.
Recent articles address important issues:
- Trump Account conformity and more (August 2026)
- California launches new EV rebate program (August 2026)
- Special property taxes assessed against vacant properties (August 2026)
- California expands sales tax to include sales of digital products (July 2026)
- Tax provisions contained in 2026-27 budget deal (July 2026)
- California’s method of calculating nonresident income for OSTC purposes may be unconstitutional (July 2026)
- Appellate court rejects FTB’s position on taxation of nonresident sole proprietors (June 2026)
- Governor includes tax changes in revised budget proposal (June 2026)
- Be aware of liabilities when buying business assets (June 2026)
- Passthrough entity tax: new laws, new year, new considerations (May 2026)
- FTB agrees to settle LLC annual tax class action litigation (May 2026)
- Make sure your clients aren’t overpaying business property taxes (May 2026)
- Conformity clean-up bill introduced (April 2026)

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Plus! Get access to the Strategic Tax Advisor
Leading-edge analysis for your business and high net worth clients
Turn to the Strategic Tax Advisor when you need answers to more advanced and complex questions on California tax issues, with articles focusing on recent critical developments:
- Latest state tax Public Law 86-272 developments (December 2025)
- Exclusion of interest on agricultural loans (December 2025)
- Florida sues California over apportionment rules (December 2025)
- OBBBA’s changes to international tax provisions (August 2025)
- Use tax applies to parts purchased for product that was never sold (August 2025)
- Spidell’s updated multistate business charts (August 2025)
- FTB continues to closely scrutinize like-kind exchanges (April 2025)
- Want to exclude gain from the sale of qualified small business stock? (April 2025)
- Right loss, wrong year (April 2025)

Digital edition
Read every issue from your PC, Mac, iPad, e-Reader, or e-mail browser.
Take a look at some sample formats
Other Subscriber Benefits
- Free State Tax Directory for your tax library!
- Optional 1 hour of CPE for CPAs and CRTPs (CTEC) with each issue for only $15 (exam sent every six months).
- Annual Conformity Guide listing hundreds of differences between federal and California law.
Trusted by CA tax pros
“In a word, ‘invaluable!’ I can’t imagine calling myself a professional without the ongoing support of Spidell behind me. In particular, the California Taxletter is the ONLY publication I read faithfully.”
— Deborah St. Martin, EA; Beaumont, CA
More than a monthly newsletter
Get quick access to California tax information with a searchable online archive of back issues. Director of Editorial, Kathryn Zdan, EA, shows you how to look up specific topics and search through hundreds of articles dating back to 2009.
California Taxletter helps you:
- Use searchable online archive of over six hundred articles
- Read plain English explanations of new state tax-grabbing programs, new laws, plus examples
- Let trouble-shooting instructions help you solve pesky bills and notices your clients get
- Cut time with handy charts, checklists, and client letters
- Quickly solve problems with phone numbers, links, and California tax contact information

Guarantee of excellence
Your satisfaction is our priority. If you are not completely satisfied with Spidell’s California Taxletter® in any way, at any point in time during the coming year, we will provide you with a full refund, hassle-free. Guaranteed.
