line 45 depreciation type MACRS (acrs is no longer an acceptable method. the last year it could be used was 1986) s/b automatic
line 46 if asset class is residential then it should be R commercial would be NR s/b automatic (based on type on line 5)
line 47 select ALT (TT evidently does not use ADS) it may be in red but should not show up as an error
line 48 MACRS convention MM (mid-month also automatic)
line 49 ignore
line 50 s/b 30 years also automatic. you can not use 40 years for residential real estate (but see below) only for commercial real estate.
40 years would apply to residential real estate if place in service before 1/1/18 but you would have had to have made the ADS election in the year placed into service
by the way 30 years for Residential is 3.333333% per full year whereas normal MACRS is 27.5 years 3.636363%.
40 years for commercial is 2.5 % per full year whereas normal MACRS is 39 years 2.564103%
just pointing out that the difference in depreciation deductions is small MACRS (actually the GDS system) vs ADS. however, the choice is yours.
