Business Tax Specialists for S-Corps, Partnerships & C-Corps
SDO CPA helps business owners with S-Corps, partnerships, C-Corps, Schedule C, and multi-entity structures through proactive, year-round tax planning and strategy.
Services That Work Together
Start anywhere. We grow with you.
Outsourced Accounting
Full back-office management: AP, AR, payroll, reporting.
Learn More →Complex Situations Are Our Specialty
S-Corps, Partnerships & C-Corps
- Reasonable salary optimization
- K-1 allocations and basis tracking
- Multi-entity coordination
Sole Proprietors & Schedule C
- Self-employment tax strategies
- Home office deduction optimization
- Business expense maximization
- Entity upgrade analysis
International Tax Compliance
- Form 5471, 5472, 8865, 8858
- FBAR and foreign financial reporting
- GILTI, Subpart F, foreign tax credits
Real Estate Investors
- REPS status qualification
- Series LLC asset protection
- Cost segregation, 1031 exchanges
Tax Preparation & Compliance
- Business returns (1120-S, 1065, 1120)
- Sole proprietor & individual returns
- Multi-state filing
Why Business Owners Choose SDO
Big Four Experience
18+ years including EY and KPMG. We apply Fortune 500 strategy to growing businesses. If you've got multi-entity structures, international compliance, or partnership allocations, we've handled situations 10x more complex.
Year-Round Planning
We start planning in October, not scrambling in March. Quarterly check-ins, proactive strategy, and fast communication all year.
Specialist Focus
We've filed 1,000+ business tax returns across all entity types. It's what we do.
Complex situations are our specialty: multi-state, multi-entity, international. We specialize in exactly this.
What Our Clients Say
Trusted by business owners across all entity types: S-Corps, partnerships, C-Corps, Schedule C, and real estate investors nationwide.
"I found SDO CPA when my previous accountant retired. SDO CPA helps me with my complex personal, business, and real estate investments, so I don't have to worry about it. I highly recommend them."
"I'm too busy working with IT clients to worry about my accounting and bookkeeping. SDO CPA saves me from making mistakes, and they handle everything financial-related that I don't know or have time for."
"SDO CPA handles tax preparation across my family and real estate investments. I strongly recommend getting a CPA on your team because their diverse knowledge will save your skin many times. SDO CPA is my go-to CPA."
How It Works
Discovery Call
We analyze your current situation, entity structure, and tax history. You'll know within 30 minutes if we're the right fit.
Strategy & Onboarding
We build your tax strategy, clean up any existing issues, and set up your client portal. You get an upfront estimate before we start.
Year-Round Partnership
Monthly or quarterly check-ins, proactive planning, and fast communication. Not just April.
Expert Resources
Guides and calculators for every entity type. Built from 18+ years of real client work.
S-Corporation Tax Guide
Reasonable salary, QBI deduction, distributions. The complete S-Corp playbook.
Read Guide →Partnership Taxation Guide
K-1 allocations, basis tracking, guaranteed payments. What every partner should know.
Read Guide →Schedule C Guide
Deductions, self-employment tax, home office rules. Everything sole proprietors need to know.
Read Guide →Tax Advisory
Year-round planning beats once-a-year filing. See what proactive tax strategy looks like.
Learn More →Retirement Tax Planning
Roth conversions, Solo 401(k), mega backdoor strategies. Tax-smart retirement moves.
Read Guide →C-Corporation Tax Guide
When C-Corp makes sense, QSBS exclusion, and avoiding double taxation.
Read Guide →Based in Texas. Serving Businesses Nationwide.
214 S Main St, Suite 101-C
Duncanville, TX 75116
We work with clients in many states and countries around the world through our secure client portal. Whether you're in Dallas-Fort Worth or across the country, we deliver the same hands-on business tax expertise for all entity types.
Ready for Year-Round Tax Planning?
Schedule a free discovery call. We'll analyze your situation and tell you exactly how we can help.
Uploading documents does not create a CPA-client engagement. Returns are used for assessment and pricing purposes only.