Continuity mistake: The instructions Evelyn is given had two copies created for the film - the handwriting and circling of the numbers change between shots when she's reading them in the IRS office. Notably the first time we see the instructions it says "don't forget to breath" at the bottom, then later that's changed to "breathe" as it should be. Although interestingly that change is the only one on that version of the notes, implying someone caught the grammatical error during filming and added the "E."
Continuity mistake: When Evelyn is fighting the girl with the dog in the office, the dog changes color when it gets kicked, likely because it's a fake dog.
Continuity mistake: When Evelyn has taped up Joy to the chair, we can see the tape move up and down between shots, showing there were multiple takes.
Continuity mistake: Evelyn is reading the instructions for the transition. Item 4 says "Don't forget to breath." When she reads them again prior to pressing the green button, the note now correctly says "Don't forget to breathe."