"Calling it" is a phrase commonly used to indicate the end of something, such as a prediction or decision. There are various synonyms that can be used to express the same sentiment. One of the more formal options is "concluding," which refers to a final determination or judgment. Other alternatives include "deciding," "settling," "determining," "resolving," "settling on," "choosing," or "opting for." "Wrapping up" is a more informal and casual synonym indicating that something is coming to an end. It's crucial to choose the right synonym to convey the intended meaning and tone of a message effectively.