When a LLC “checks the box” by filing a Form 2553 to elect to be treated as a corporation and simultaneously elect S status, it must live by all the S corporation restrictions. That includes the restriction on only having one class of “stock” issued by the entity during the time it wishes to remain an S corporation.
In reality, there is no such federal tax entity as an “LLC”—the structure was originally designed when the first statute was adopted by Wyoming decades ago to be an entity for which there was no federal tax treatment specifically mandated. To this day the IRC does not have provisions outlining the tax treatment of “LLCs” but rather, under the check the box regulations found at Reg. §301.7701‑2 the entity is treated for federal tax purposes as one of the entities that the IRC knows about.
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