By creating an LLC with only one individual (you), you have created what the IRS calls a single member LLC.
By default, for tax purposes, this entity is considered "disregarded" and is treated as any other sole proprietorship; you file a Schedule C.
The only reason to file a form 8832 is if you want to treat your LLC differently than the default.
The only reason to file a form 2553 is if you want to be treated as an S corporation. However, to do this, you would also need to file the form 8832 to treat your LLC as an association.
There are numerous pros and cons in determining what type of entity structure is best and a forum such as this is not really optimal in trying to determine the best entity structure.
But bottom line, if you are only wanting to be treated as a sole proprietor, then you do not need to do anything else. Additionally, being a sole proprietor and having no sales, means you can just not file your Schedule C for 2020 since you had no activity.
Having said that, you indicate you had no sales. Does that also mean you had no expenses? Did you actually begin your trade or business in 2020 and just didn't generate any sales?
The response to these questions will also impact whether you need or should file a Schedule C.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
