Sale of residential rental property owner lived in 6 years before

[Juanita]

Owner lived in house for 6 years before converting to rental property
Owner did major improvements to property while living in house
These improvements were not picked up and depreciated when house was rented out-only amount on sale to owner picked up and depreciated.
How should these major improvements be handled now that the property was sold in 2016?
Is there a certain form that needs to be used report these on?
Thanks

[ATSMAN]

Looks like a Form 3115 needs to be filed to correct the depreciation error.

[Juanita]

Improvements were not picked up as part of Orginal cost of house

Can these Improvements be picked up on this form also and added to original cost of property?
Thanks

[taxea]

I would add them to the basis when calculating the sale.