Filing Form 6765 incorrectly can cost your business valuable R and D tax credits. This clear, step-by-step guide explains every section, eligibility rules, and documentation tips to ensure accurate filing. Learn how to choose between the regular credit, simplified credit, and payroll tax credit for startups. Designed for small businesses and growing enterprises, this guide helps you avoid costly errors, stay IRS compliant, and maximize your R and D tax savings. Follow these instructions to claim your credit confidently and correctly.