Can you say we when writing a report with formal conventions?

No, it is not appropriate to use the word "we" when writing a report with formal conventions. Formal writing typically requires the use of the third person perspective to maintain objectivity and avoid bias. Using "we" can imply a sense of subjectivity or personal involvement, which may not be suitable in a formal report. Instead, it is recommended to use the third-person pronouns "he," "she," "they," or "it," depending on the context, to convey a neutral and impartial tone.