Some Insurance Questions

[Thomas O'Donnell]

Property insurance questions below. I should have asked these questions sooner. 

I purchased a duplex in September 2022 and have occupied one of the units since then. I had the roof redone and insulation added to the attic in October 2022. Was I supposed to inform my insurance about this? If so, what does this affect? I am also now moving out of the duplex and will be renting out both sides (this would no longer be my primary home). Do I also need to notify my insurance of this? What would this change insurance/tax wise? Sorry if these questions seem unclear, I can clarify if needed. TIA!