As a certified public accountant with over 15 years of experience specializing in self-employment taxation, I've compiled this detailed analysis to help freelancers, independent contractors, and small business owners navigate complex tax regulations. The cornerstone of self-employment tax planning is understanding the Qualified Business Income Deduction (QBID), which allows eligible taxpayers to deduct up to 20% of their qualified business income. However, this deduction phases out for individual filers with taxable income exceeding $164,900 and married joint filers above $329,800. Beyond QBID, proper documentation of business expenses is crucial—deductible categories include home office costs (calculated using the simplified method at $5 per square foot up to 300 square feet or actual expenses), vehicle expenses (standard mileage rate of 67 cents per mile for 2024 or actual costs), equipment purchases (subject to Section 179 expensing limits up to $1,220,000 for 2024), health insurance premiums, and retirement contributions (e.g., SEP-IRA limits up to 25% of net earnings or $69,000 for 2024). Self-employment tax itself comprises 15.3% for Social Security and Medicare, though half is deductible against income tax. Quarterly estimated tax payments are mandatory to avoid penalties; use Form 1040-ES and calculate based on 90% of current year liability or 100% of prior year tax (110% if AGI exceeded $150,000). Record-keeping requirements include retaining receipts for at least three years and using accounting software for accuracy. Recent IRS updates emphasize digital transaction reporting for payments over $600 via Form 1099-K, requiring meticulous income tracking. Strategic planning involves evaluating entity structure (sole proprietorship vs. S-corp), maximizing retirement savings, and leveraging health savings accounts (HSA contributions up to $4,150 for self-only coverage in 2024). Always consult a tax professional for personalized advice, as deductions like the QBID have specific limitations based on business type and income levels.