Tomkins Tax Consultants has been serving the City of Lucerne and the County of Lake since 1974, providing personalized help for your financial needs. We have offices in Lucerne and Lakeport.


We work with you on a personal level to determine the best solutions for your unique needs, then leverage our seasoned expertise to achieve the best possible results.


We are your trusted partner in success. Our firm is large enough to offer a full range of professional services at a fair price, but small enough to give you the individual attention that you deserve.


Rest assured that when a need arises, our firm is ready and capable to handle everything for you so you can focus on what matters most to you.

Meet Diane:

diane-planteDiane T Plante, CPA

Diane Tomkins Plante, CPA – I graduated high school from Upper Lake and college from California State University, Sacramento. I earned a license as a registered dental assistant and used that to work my way through college. I’ve been practicing accounting and bookkeeping since 1995 and completed my licensing requirements for Certified Public Accounting in 2000. My history includes 3 years in private accounting and over 6 years auditing experience with another accounting firm. I’ve worked with my father since 1995 as a tax preparer and consultant, and now full-time in this capacity. My community service includes the board of directors for Hospice Services of Lake County and Good Shepherd Ecumenical Academy, in addition to volunteer duties on the Upper Lake High School Bond Measure for the new facilities. My family and I have decided to live in Lake County for the beauty, business opportunities and friendships here. I look forward to serving you.

Diane is a member of California Society of Certified Public Accountants and National Association of Enrolled Agents.