This is the 5454th most frequent Korean word.
마무리했다고
"마무리했다고" means "said (someone) finished/completed."
The term '마무리했다고' is used here to indicate that the action of completion of a task (the project) has been conveyed or confirmed in a statement.
프로젝트를 성공적으로 마무리했다고 팀원들에게 전했습니다.
They informed the team members that the project was successfully completed.
In this sentence, '마무리했다고' reflects the speaker's assumption or belief that they have concluded their activities for the day.
오늘 마무리했다고 생각했는데, 아직 더 할 일이 남아있네요.
I thought I had finished today, but there is still more work to be done.
Here, '마무리했다고' is utilized to describe the claim or statement about the completion of the creative process.