Yes, you can customize your calculations on DealWorthIt software. The software provides customizable calculations that tailor your analysis to your investment criteria and goals. You can input data such as property information, expenses, and financing options and then adjust the calculations to reflect your investment strategy. For example, you can customize the calculations to include different rates of return or financing terms. You can adjust the calculations to account for taxes, maintenance, and other expenses. The software is designed to be flexible and adaptable, so you can customize your analysis to suit your needs and investment goals.