Q.Rhododendron
Need to cut back rhododendron bush. It’s up against the house and getting too tall. When and how should we do this? Also, we have a peach tree that bloomed last year, but is showing no signs of fruit this year. We have not done anything to this tree. We live in central Illinois.

Certified GKH Gardening Expert
This article should help with your rhododendron: https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/pruning-rhododendrons.htm
As for the peach tree, this sounds like a pollination issue. If the flowers are not pollinated, the tree will shed them when they are small. These articles may help you:
https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm