Find the SDO CPA Resources Here:
Partnership Tax Guide | Complete Compliance & Planning Guide
Master partnership taxation with our comprehensive guide. Form 1065, K-1s, basis tracking, multi-state compliance, and tax strategies. Free resources included.
Complete S-Corp tax guide. Learn when to elect S-Corp status
Complete guide to S-Corp election, reasonable salary, QBI deduction. Save $8,000-50,000+ annually with strategic tax planning. Free tools.
S-Corp Tax Savings Calculator 2026 | Estimate Your Potential Savings
Free S-Corporation tax savings calculator. Estimate potential tax savings when switching from LLC to S-Corp—personalized analysis based on your income and situation.
S-Corp 401(k) Ultimate Guide: Save in Retirement
Master S-Corporation retirement planning with solo 401(k). Learn contribution limits, employer strategies, and save $20,000+ annually in taxes.
Master Real Estate Tax Strategy & Entity Planning
Strategic entity planning, permanent tax benefits, and state-specific optimization for smart real estate investors
Form 1040-NR Guide: Nonresident Alien Tax Return
Complete guide to Form 1040-NR for nonresident aliens. Filing requirements, deadlines, deductions, tax treaties, FIRPTA, and common mistakes.
Form 8865 Guide: Foreign Partnership Filing Requirements
Complete guide to IRS Form 8865 for U.S. persons with foreign partnerships. Filing categories, required schedules, penalties, Section 721(c), and deadlines. By SDO CPA, international tax specialists.
QBI Calculator | Section 199A Tax Deduction Calculator
Calculate your QBI deduction with our free Section 199A calculator. Compare S-Corp vs Partnership tax savings. Save up to 20% on business income taxes.
FBAR Filing Guide: FinCEN Form 114 Requirements
Complete guide to FBAR filing requirements showing the $10,000 foreign account reporting threshold
The Complete Guide to Form 5472 for Foreign-Owned U.S. Businesses
Professional guidance for foreign investors and their businesses on Form 5472 compliance, helping you understand filing requirements and avoid costly penalties
Form 5471 Guide: U.S. Shareholders of Foreign Corporations
Complete guide to Form 5471 filing requirements for U.S. persons with foreign corporation interests. Categories, GILTI, Subpart F, penalties, and compliance.
Client Portal for Current SDO CPA Clients
The client portal allows existing clients to download their tax returns, chat with our CPAs and accountants, upload files, make payments, and more. It speeds up your tax returns and accounting. If you're a current client but need to be added to the portal and want to be, contact us, and we'll get you set up.
Upload Files Securely
You can upload your files directly here securely. Just click the button, and you'll be able to securely upload statements, QuickBooks files, receipts, and more in just a few minutes.
Where's My Refund?
You can usually check the status of your income tax refund 24 hours after e-filing. If you filed a paper return, please allow 4 weeks before checking your status.
Mobile App for Client Portal
Use our free mobile app to chat with our team and scan documents and receipts. When opening the mobile application, please enter SDO as your firm domain and use your email and password to log in.