When it comes to expressing that something is not accurate or true, there are various synonyms for the phrase "be incorrect" that can be used. One phrase that can be used is "be wrong," which indicates that something is not accurate or correct. Similarly, "inaccurate" can also be used to describe something that is not true or correct. "False" and "invalid" are also synonyms for "be incorrect," both conveying that something is not factual or true. Additionally, "mistaken" and "erroneous" can be used to express that there has been an error or mistake in something that was previously considered or presented as factual or true.