How can I change my direct deposit info and look up W2s from a previous employer? I lost my job April 2019 and struggled to find work, now working with Afni and Postmates

I worked at Conduent from July of 2015 to 2019, worked at Dunkin Donuts for a day or two and worked at The Bat Complex, all in Lexington then became unemployed again due to COVID and lost almost everything I own and I want to put my missed stimulus checks into PayPal Cash as my last banking app is closing.