Claiming dependents

My Daughter & I have guardian ship on my 3 nieces & nephew, she has been claiming them for the past 3 years, I have my own place so we both care for them half & half threw out the year. What is required for me to claim them for year of 2022?

I also need to file for 2020 & 2021, would like to set an appt. With someone who can file paperwork correctly & then with all the new credits available.