Quarterly Estimated Taxes Made Simple: The 2026 Self-Employed Guide

Stop guessing. Stop overpaying. Stop the April panic.If you're a freelancer, 1099 contractor, or solo business owner, the IRS expects four estimated tax payments a year - and most self-employed people are walking around with no system, no safe harbor, and a low-grade dread that builds toward April.This book ends that. Written by a PTIN-certified tax preparer who works with 90+ Schedule C clients, it gives you the operating manual nobody handed you when you went solo.What you'll learn: - The 110% safe harbor rule that protects you from penalties even when your annual income is unpredictable- How to calculate Q1, Q2, Q3, and Q4 payments for the 2026 deadlines - with worked examples- The 15.3% self-employment tax adder most freelancers forget about until April- The annualized income method for seasonal businesses and uneven earners- State-specific rules for California, New York, Texas, and other high-impact states- EFTPS, Direct Pay, and voucher mechanics - including pro tips most CPAs don't share- Year-end reconciliation strategies to catch problems in November, not April- 2026 TCJA sunset implications for your estimated tax planningBuilt for self-employed people who want to understand the system, not just follow a checklist.By the end of this book, quarterly estimated taxes will be a 30-minute task you do four times a year - not an annual crisis. You'll have the same playbook the author uses with paying clients, broken down step-by-step with real numbers and the 2026 deadlines.Includes companion calculator and template recommendations for the ARJE Quarterly Estimated Tax Calculator and full PDF + Templates Toolkit (sold separately).About the author: Arnold Dizon is a PTIN-certified tax preparer and founder of ARJE Bookkeeping & Tax Services in Henderson, Nevada, serving 90+ self-employed clients across bookkeeping, tax preparation, and tax planning.