The question is incomplete and the full version can be found online.
Answer:
This sentence is not punctuated correctly.
Step-by-step explanation:
The correct punctuation would be as follows:
"If you don't inform the landlord within thirty days," warned Carla, a longtime tenant, "you may never get your faucet fixed."
The period mark that follows the word "days" should be a comma, because the if clause is at the beginning of the sentence, meaning that it's a conditional Sentence.
The last period mark should be placed inside the quotation mark, not outside because commas and periods that are part of the overall sentence must always go inside the quotation marks, even if they are not part of the original quotation.