Will rate high!

In years (ex: 7.56), what is the remaining life (if any) for the asset:

1. given today is 12/31/2020 :
2. Date asset was bought (column D)
3. Lifespan of asset (column H)

Answer can be none if assets lifespan does not go past 12/31/2020

I am looking for an excel formula for column J that can be dragged down.

(can be solved any way you'd like as long as the answers are right)