Since this is Turbo Tax's main product and source of income I would expect a simple change to one line on Schedule 1 that links to at most 3 other sections of the tax return shouldn't require more than a 100 lines of code, if that. If I were at customer service (or other designated department) at Turbo Tax to be monitoring IRS notices and updates from January 1 to tax filing day. This would ensure they are on top of changes. The second thing is to have a giant notice when you open Turbo Tax of critical changes. Or emails if you've registered your product. This is a customer service company after all.
