LLC C CorpThe next month starts on paper

An LLC can wait on the federal choice. A C corporation does not. Either way the books open before the first real month.
An LLC leaves the federal choice open. You can operate, and the default classification can sit there until you file a form that moves it. A C corporation does not leave that choice open in the same way. Once the company is a corporation for tax, the return is the corporate return, and a dividend follows the corporate rules. Moving off that life later is a project with forms, a clock, and a set of books that has to be retold.
Before the first real month, open the books in the life you picked, and set up payroll with a provider you will run. Setup is the job we will do. Running payday is not. The provider calculates and pays. We keep the books matched to what the provider already did.
A month is finished only after the bank statement and the books tell the same story. A nice stack of receipts is not a close if the statement still disagrees. During the year, set money aside for the tax the box implies, so the due date is not the first time you see the size of it. We will not print a fraction here. The fraction is a fact about profit, wages, and the box, and it is computed in the work.
A deadline that is the same in every state still needs a calendar. The 15th day of the fourth month is that kind of date for a calendar-year corporate return. Put it where you put the rent. Then the books have a reason to be closed before it arrives.
What changes slowly
Entity, election, payroll rail, and the names on the accounts. What can change in a week is the labeling of a deposit. Start there if the company already exists and the box is foggy.
Name the next month
You will be talking to the Steven Palmieri practice.
Name the month you want opened, and the box you ticked.