H.R.1 Sec. 70302. Full expensing of domestic research, experimental expenditures
congress.gov
congress.gov
This section reverts the ammortization of domestic R&E expenses.
Previous discussion: https://news.ycombinator.com/item?id=44226145
Foreign software R&D is still forced to be amortized over a 15 year period; see pages 304,305,306 of the bill.