Elon Musk Sells Another $1 Billion in Tesla Shares to Prep for Largest Tax Bill in History Posted byEntrepreneur Staff December 29, 2021 Leave a comment on Elon Musk Sells Another $1 Billion in Tesla Shares to Prep for Largest Tax Bill in History The Tesla and SpaceX CEO has an estimated federal and California income tax bill of $11 billion waiting for him.