Can I switch filing online with Self employed to filing online using home and business ?

@14praz 

Home and Business Edition is desktop software (CD/download) to install on one's computer.   It does the same thing as Self-Employed, but has more features than Online Self-Employed, such as an included state program, can prepare multiple Federal returns, has the Forms Mode feature for direct editing/viewing of forms during preparation, etc.

It's not clear what you are wanting to do.   Did you start an online return at the TurboTax website, and do you now want to download your *.tax2019 data file from the Online Self-Employed to finish and file in the desktop software Home and Business?  If so, we can tell you how. 

Or do you just want to start a return from scratch in the desktop software (CD/download) version of Home and Business?    Did you purchase the desktop software or are planning to?

Or are you asking where to purchase the Home and Business download/CD from TurboTax?

https://turbotax.intuit.com/personal-taxes/cd-download/