If your business is operated as a sole proprietorship, combining your business and personal accounts and categories into one file works best.
If your business is incorporated or operates as a partnership where you receive a regular paycheck for your labor and management, you will probably want to set up one data file for the business and one date file for your personal financial information. To create another file, simply follow the instructions in Creating Your First Data Folder and File.
For the business data file you will need to delete all the categories in the Category & Transfer List. This will allow you to create the income and expense categories that are best suited for your partnership or corporation.