How do i get my 4 year old to use the potty

Hollie

Ive tried everything , i sit her down for 1 minute every 20 30 minutes , she says shes done i give it a little more time she pees but wont poop , i haven't put pullups in over 2 /3 months i don't wanna confuse her , but im tired of buying underwears , im a single mom father lives in other state so shes always with me any ideas 😟😣 i feel like im loosing hair I've been trying to potty trained since 3 years of age