Small Business Tax Services in Brea, CA

ClearFixTax supports small businesses across every stage of the tax cycle. 

Our services cover:

• Federal and California state business tax return preparation
• Quarterly estimated tax calculations and filings
• Entity-specific compliance (sole proprietor, LLC, S-Corp, C-Corp, partnership)
• Business deduction identification and optimization
• Startup tax guidance for new businesses
• Prior-year returns and back filings for businesses that have fallen behind
• IRS notice response and audit representation for business returns
• Coordination with your bookkeeping and payroll for a unified financial picture

We do not treat business tax preparation as a one-time event. It connects to everything else in your financial operation, and we manage it that way.

Every business structure comes with its own filing requirements, tax deadlines, and planning opportunities. ClearFixTax works with all of them.

Sole Proprietors. If you operate as a sole proprietor, your business income is reported on your personal return through Schedule C. We make sure your income is reported correctly, your deductions are fully captured, and your estimated tax payments are on track to avoid penalties.

LLCs. Single-member LLCs are taxed like sole proprietors by default, but multi-member LLCs file as partnerships. In some cases, electing S-Corp taxation can reduce your self-employment tax bill significantly. We help you understand the options and choose the structure that saves you the most.

S-Corporations. S-Corps require their own tax return (Form 1120-S), reasonable salary determinations, and careful coordination between owner compensation and distributions. We handle all of it, including the payroll side through our payroll services.

C-Corporations. C-Corps face double taxation on profits and dividends, but they also offer planning opportunities around retained earnings, fringe benefits, and timing. We prepare Form 1120 and advise on strategies to minimize total tax exposure.

Partnerships. Partnership returns (Form 1065) require accurate allocation of income, deductions, and credits among partners. We prepare the return and each partner's Schedule K-1, making sure everything is consistent and properly allocated.

One of the most common problems small business owners face is falling behind on estimated tax payments. The IRS expects you to pay taxes throughout the year, not all at once in April. If you underpay, you get hit with penalties.

ClearFixTax calculates your quarterly estimates based on actual income, not guesswork. We track your financials throughout the year and adjust your payments as your income changes. When your books are also managed by our team, this process becomes even more precise because we already have real-time visibility into your numbers.

Quarterly filing deadlines for 2026:

• Q1: April 15
• Q2: June 15
• Q3: September 15
• Q4: January 15, 2027

We track every deadline and make sure your payments are submitted on time.

Small business owners leave money on the table every year by missing deductions they are entitled to. Some of the most commonly overlooked include:

• Home office deduction (for businesses operated from a home office)
• Vehicle and mileage expenses for business use
• Health insurance premiums for self-employed owners
• Retirement plan contributions (SEP-IRA, Solo 401k)
• Professional development, training, and subscriptions
• Software, tools, and equipment purchases
• Business insurance premiums
• Startup costs in the first year of operation

Our team reviews your expenses with a fine-tooth comb to make sure every legitimate deduction is captured. This is where having integrated bookkeeping makes a real difference, because organized records mean nothing gets lost.