Non-Profit Docs YHS Boosters is a 501(c)(3) tax-exempt non-profit. All your donations that support our student athletes are tax deductible! Our EIN is 84-3848135. Download a copy of our Certificate or EIN letter below, if needed. Yorktown Boosters Inc EIN LetterDownload Yorktown_Boosters_Inc._52199323_Certificate_2022Download