Schedule E depreciation expense and recapture

I have been receiving rental income from my employer for the office in my home and reporting it on Schedule E for years. I have been depreciating a $74K portion of my home and deducting other expenses as well. Now I have retired and will show no more income on Sched E. Can I still deduct depreciation expense? Will accumulated depreciation be recaptured when I sell the house? How does this work?