I want to send my sat scores to some schools but my act to others, do i have to self-report my scores on the common application if I don’t want every college i’m applying to, to see both scores?
You are not required to self-report anything, as long as you are meeting the school’s testing requirements with official score submittals from the testing company.
You are also allowed to change that section between app submittals. So if you want to self-report some scores to some schools, you can choose which ones to include for each app.