I purchased Turbo Tax Self employed version for 2023. I am switching to a new computer how do I reinstall software and get previous years data back?

If you are using TurboTax Online Self-Employed, then you just need to log into the same account that you used in previous years and PDF copies of your returns should be there. This YouTube video shows you how: https://www.youtube.com/watch?v=YWcviv4agec