Never mind the OS comment ... had a mind glitch for a second ... you are posting from the online version using an OS x 10.13 and I was thinking you needed at least 10.14 for the download but you only needed 10.12 so you are good.
I am glad you have the downloaded versions and know how to use the FORMS mode & the What-If option set to the 2018 choice ... that is going to be the best estimate you are going to get right not due to the flux the tax laws are in right not ... capital hill still talking changes by year's end ... will the madness ever stop?
