Yes, and the EIN usually comes with it. Here's what has to be checked before you build on it.

You can split your time between two states, but not your residency. Here's how states decide who taxes you, and what the other state can still reach.

Your home state taxes everything, other states tax what's earned there, and a credit covers the overlap. Mostly. Here's how it works.

A resale certificate lets you buy inventory tax-free because you'll collect tax when you sell it. Which certificate to use, and how businesses misuse them.

Forming in Wyoming or Delaware doesn't move your business there. The states that tax you are the ones where you live and work.

"Doing business" means different things to the Secretary of State, a licensing board, and a revenue department.

Opening a bank account in another state usually doesn't require registering your LLC there. Here's what actually triggers registration.

Delaware is the right answer for a specific kind of company. Here's whether yours is one.

Three ways to move an entity between states, with different tax and continuity consequences.