I did breastfeed for almost 3 years so there is no time and sometimes babies themselves stop at 16-18 months and some continue as long you feed them

It’s your personal call.. you can stop when you and your baby is comfortable... slowly you can start weanin your baby and first stop day feed and then night feed...

As far as you and baby are comfortable with breast feeding you can continue the same dear.;
There is no such thing ki one year ho gaya toh stop kar dena he.;
And if u wanna stop now than u can check out ways to avoid it