Settings > Settings Window - Company > Settings Window - Company > Information > Add, Change, or Remove Your Business Number
                                
                                Add, Change, or Remove Your Business Number
To add, change, or remove your company's business number:
- In the Home window on the Setup menu, choose Settings.
 - Click on Company and then Information.
 - In the Business Number box, enter, change, or remove your company business number.
 - Click OK.