Use Trademarkia to determine if the corporate name you want to use is already trademarked.
If the exact name as yours or a similar one exists, you may still be able to use it. Business names are registered on a state-by-state basis, so you could be OK using the same or similar name, assuming it will only be used in the state in which you incorporate.
However, you may run into intellectual property issues—especially if you decide to brand your firm nationwide or expand beyond your state.