Free tool for Founders and Investors to check the QSBS (Qualfied Small Business Stock) tax exclusion eligibility. The Section 1202 exclusion is one of the most valuable tax benefits in the U.S. tax code. It's also one of the most misunderstood — and easiest to lose. Eligibility needs to be confirmed through the entire life cycle of the startup - from the very beginning through exit. Our free tool allows founders to check eligibility as needed in under five min. Additional resources available.