What is the basis of an asset that is never depreciated?

Landfixed asset is never depreciable. It has an unlimited useful life and therefore can not be depreciated.

How many years do you depreciate a computer?

Five-year

Five-year property (including computers, office equipment, cars, light trucks, and assets used in construction) Seven-year property (including office furniture, appliances, and property that hasn’t been placed in another category)

How many years do you depreciate a washer and dryer?

5 years

Used and new appliances depreciate for up to 5 years.