an S-corp return can only be prepared using Turbotax business. If you do not file the return, you will not be able to deduct the losses you incurred. To do it on your desktop you need a windows PC using windows 10 or above
assisted prep is also available.
assisted prep link
https://turbotax.intuit.com/small-business-taxes/
buy app to do on PC
https://turbotax.intuit.com/small-business-taxes/cd-download/
other websites also sell the desktop app to download, be wary of those offering discounts. may be malware