How Do I Make an Election for a Corporation?
If you don’t, you’ll be taxed as a sole proprietorship in 2020 and as an S corp in 2021. You must file Form 2553 within two months and 15 days of the beginning of the tax year that you want your S corp tax treatment to start. For example, if you want your existing LLC to be taxed as an S corp in 2020, you need to file Form 2553 by March 15, 2020.