Answer : There is no short answer for this question since it depends on many factors, such as your personal preferences, what type of interior design you'll be doing (e.g. residential, commercial, hospitality), and your budget.
That said, I would recommend AutoCAD 2020 for anyone looking for a versatile and powerful CAD software package for interior design. This latest version includes numerous features and enhancements that can make the interior design process quicker and easier, such as an updated user interface, increased stability and performance, enhanced support for DWG files created in other CAD software packages, and more.