It's good to see you here, @tinewinkjohn. Let me provide some details about negative net cash in QuickBooks. 

Negative cash flow occurs when a business spends more than it makes within a given period. Although negative cash flow means there is an imbalance in the revenue stream, it doesn’t necessarily equate to a loss. Often, it reveals temporarily mismatched expenditures and income.

To fix this, I suggest reviewing your categorized transactions within QuickBooks. This is to ensure that your book is accurate. 

Also, It would be best to consult an accounting professional for other possible options. They are can guide you on what account to use when setting up tips in QuickBooks. 

For more info, feel free to visit this article: What is Negative Cash Flow and How to Manage It.

Keep me posted if you have other accounting concerns with QuickBooks. I'll be around to help you further. Have a nice day.