While some programs might accept a BS in psychology, a
BA in psychology is generally preferred and often required for admission to graduate programs in psychology leading to licensure as a psychologist. The differences between a BA and a BS in psychology are often minimal, but the BA typically emphasizes more liberal arts coursework, whereas a BS might have a slightly stronger emphasis on scientific methodology. However, the core psychology coursework is very similar.
Ultimately, it's best to check the specific admission requirements of the graduate programs you're interested in. They will clearly state whether they prefer a BA or BS or will accept either.