Need input, please, on when we can stop giving formulas and what are the substitutes. Many thanks.

You can stop giving formula from 1 year old onwards because after they turn 1, food is the main source of nutrients so there's no need to supplement with milk/formula if LO is okay with not having milk and eating well :) If you'd still like to provide milk, then you can consider fresh milk as an alternative - cow milk, goat milk or plant-based milk like soy and almond are fine too! Having said that, it's still up to you and your child's personal preference as to when you stop or what you switch to.