Expert Business Tax Services for California Companies
S-Corp, LLC, C-Corp & Partnership Tax Filing in Orange County, Riverside, LA & Moreno Valley
Minimize your business tax liability with certified CPA expertise. We handle all business entities including S-Corporations, LLCs, C-Corporations, and Partnerships with strategic planning and maximum deductions.
Business Tax Services by Entity Type
Expert tax preparation for every type of business structure in California.
S-Corporation
Form 1120-S
Maximize your S-Corp tax benefits with expert preparation and strategic planning for pass-through taxation.
- Form 1120-S federal filing
- California Form 100S
- K-1 preparation for shareholders
- Reasonable compensation analysis
- Payroll tax optimization
- Quarterly estimated taxes
C-Corporation
Form 1120
Professional C-Corp tax services with strategic planning for corporate tax rates and dividend distributions.
- Form 1120 federal filing
- California Form 100
- Corporate tax planning
- Dividend strategy
- Retained earnings optimization
- Multi-state filing support
Partnership
Form 1065
Complete partnership tax services including multi-partner K-1 preparation and partnership agreement review.
- Form 1065 federal filing
- California Form 565
- K-1 for all partners
- Capital account tracking
- Distribution planning
- Partnership basis calculations
LLC (Multi-Member)
Form 1065 or 1120
Multi-member LLC tax filing with entity election optimization (Partnership or S-Corp).
- Partnership or corporate filing
- California LLC tax & fees
- Member K-1 preparation
- Election strategy (2553)
- Operating agreement review
- Self-employment tax planning
LLC (Single-Member)
Schedule C
Single-member LLC tax services with Schedule C preparation and disregarded entity optimization.
- Schedule C preparation
- California LLC fees
- Quarterly estimated taxes
- Self-employment tax
- Home office deduction
- Business expense optimization
Sole Proprietor
Schedule C
Comprehensive sole proprietorship tax services with maximum deduction identification.
- Schedule C preparation
- Self-employment tax (SE)
- Quarterly estimates
- Business vs. hobby determination
- Vehicle expense deduction
- Retirement contribution planning
Additional Business Tax Services
Comprehensive tax solutions beyond basic return preparation.
Tax Planning & Strategy
Year-round strategic planning to minimize tax liability and maximize deductions legally.
- Entity structure optimization
- Multi-year tax projections
- Retirement plan contributions
- Equipment purchase timing (Section 179)
- Estimated tax planning
- State tax minimization
Multi-State Filing
Complex multi-state tax compliance for businesses operating across state lines.
- Nexus determination
- State income tax returns
- Apportionment calculations
- Sales tax compliance
- State-specific credits
- Streamlined filing strategies
Payroll Tax Services
Complete payroll tax compliance including quarterly filing and annual reconciliation.
- Form 941 quarterly filing
- Form 940 annual FUTA
- W-2 and W-3 preparation
- State payroll tax returns
- EDD compliance (California)
- Payroll tax deposit management
Business Formation
Strategic guidance on entity selection and setup for optimal tax treatment.
- Entity structure consultation
- EIN application
- S-Corp election (Form 2553)
- California registration
- Tax projection modeling
- Operating agreement guidance
IRS Business Audits
Professional representation for business audits and tax disputes with the IRS.
- Audit representation
- Document preparation
- IRS communication
- Appeals process
- Penalty abatement
- Offer in compromise
Amended Returns
Correct errors or claim missed deductions with properly filed business amended returns.
- Form 1120-X (C-Corp)
- Form 1120-S amended
- Form 1065 amended
- Error correction
- Missed deduction recovery
- Refund claim filing
Business Tax Deductions We Maximize
Don't leave money on the table. We identify every deduction your business qualifies for.
Why Choose Catalyst CPA for Business Taxes?
Experience the difference that certified expertise and personalized service make.
Certified CPA Expertise
Licensed California CPA with 12+ years of business tax experience. We stay current with all federal and state tax law changes.
Maximum Tax Savings
Strategic planning and deduction optimization mean lower taxes and more money for your business to grow.
All Entity Types
Whether you're a sole proprietor or C-Corporation, we have the expertise to handle your business structure properly.
Year-Round Support
Not just tax season service. We're here year-round for questions, planning, and strategic guidance.
Audit Protection
If the IRS comes knocking, we represent you with full CPA credentials and handle all communication.
Cloud-Based Efficiency
Secure online document sharing and e-signatures. Work with us from anywhere in California.
Serving California Businesses
Professional business tax services throughout Southern California and beyond.
Business tax services for OC companies in Irvine, Anaheim, Santa Ana, and beyond.
Serving Inland Empire businesses in Riverside, Corona, Temecula, and Murrieta.
Expert tax services for LA Metro businesses, Long Beach, and surrounding areas.
Local business tax expertise serving our hometown community.
Cloud-based services available to businesses throughout California and select states nationwide.
What Business Owners Say About Us
Real reviews from real businesses we've helped save on taxes and grow.
Business Tax Services FAQs
Answers to common questions about business tax preparation and planning.
How much do business tax services cost?
Pricing varies by entity type and complexity. Sole proprietor returns start at $650, S-Corp returns at $1,200, and C-Corp returns at $1,500. Multi-state filing, multiple entities, and complex situations may cost more. We provide transparent quotes after reviewing your specific situation. Schedule a free consultation for accurate pricing.
When are business tax returns due?
Due dates vary by entity: S-Corps and Partnerships are due March 15th, C-Corps are due April 15th, and sole proprietors (Schedule C) are due April 15th. According to the IRS, extensions can push these dates to September 15th or October 15th, but taxes owed must still be paid by the original deadline.
Should my LLC be taxed as an S-Corp?
It depends on your profit level and circumstances. Generally, if your LLC profits exceed $60,000-$80,000, S-Corp election can save on self-employment taxes. However, it requires reasonable salary, payroll processing, and additional compliance. We analyze your specific situation and provide recommendations during consultation.
What business deductions am I missing?
Common missed deductions include home office expenses, vehicle mileage, professional development, business-use cell phone, startup costs, and retirement contributions. According to the Small Business Administration, working with a CPA ensures you capture all eligible deductions legally.
Do you handle California state taxes too?
Yes! We prepare both federal and California state business tax returns. California has unique requirements including the $800 minimum franchise tax, gross receipts fees, and specific state forms (100, 100S, 565, 568). We ensure full compliance with California FTB requirements.
Can you help with business formation?
Absolutely. We provide strategic guidance on entity selection (LLC vs. S-Corp vs. C-Corp), help with EIN application, file S-Corp elections (Form 2553), and model tax scenarios. Proper entity structure from the start can save thousands in taxes annually.
What if I'm behind on business taxes?
We specialize in getting businesses caught up. We can prepare multiple years of back returns, negotiate payment plans with the IRS, and work on penalty abatement. The sooner you address unfiled returns, the better. Contact us for a confidential consultation about your situation.
Do you work with businesses outside California?
Yes! While we're based in California and specialize in California businesses in Orange County, Riverside, Los Angeles, and Moreno Valley, our cloud-based services allow us to work with businesses in most states. We handle multi-state filing for businesses operating across state lines.
Ready to Minimize Your Business Taxes?
Stop overpaying on business taxes. Schedule your free consultation today and discover how strategic tax planning can save your company thousands. Our certified CPAs are ready to help your business thrive.
Serving Orange County, Riverside, Los Angeles, Moreno Valley & All of California