Note: When closing a company in Sage 50, you no longer display the company data. Closing a company does not close the accounting period or year.
From the File menu, select Open Company. If prompted, choose whether you want to keep the current company open or not. Sage 50 displays the Open Company window.
Select the name of the company you want to open from the Company Name list, and select OK.
The menus now appear for the company chosen. Any accounting transactions you enter are logged into the books for the company you opened. Notice that File is still the first menu available.