Safe Harbor for Taxpayers with Forked Assets Act of 2021 This bill excludes from gross income, for income tax purposes, any amount received as forked convertible virtual currency. It also establishes a safe harbor period during which certain penalties and additional taxes applicable to a taxpayer who receives a forked convertible virtual currency are suspended until the Internal Revenue Service issues regulations or guidance, or legislation is enacted, that addresses specified issues related to the tax treatment of such currency.