A real Excel register: Schedule II lives pre-loaded, SLM/WDV formulas that pro-rate on days and stop at residual, the 180-day rule and block of assets built in.
One register, both Acts — Schedule II lives already in it, formulas that cannot go negative, the 180-day split done for you, and the deferred-tax line at the bottom.
v2.1 — Office paste note updated after Microsoft shipped a fix.