How to change category group

I am attempting to change the category group for a business expense from personal to business. I've read that I need to change the tax item to something on form C or form F. However, I don't need to file either of those forms. My farm is a crop sharing rental property and I need to submit form 4835. The 4835 tax items are defined in quicken, but selecting them still leaves my category group as personal on the categories