Format margins to 2.54 cm or one inch at the top, bottom, and on both sides of the text, unless directed otherwise by your instructor or program head (American Psychological Association, 2020, p. 45). Please refer to Where Can I Find a Sample Paper That Shows Correct APA Style Formatting? to see example papers with 2.54 cm margins.
Reference
American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000