Sentence examples for but that's it from inspiring English sources

Using the phrase "but that's it" in a sentence is correct and commonly used in written English.
It is typically used to indicate that something is the final or ultimate conclusion or point, or to summarize the main idea of what has been said or written previously. Example: "I have tried every possible solution to fix my computer, but that's it. I think it's finally time to take it to a professional technician."