I have finished a job today. but the buyer did not review yet. so How long will the buyer be able to give me a review? within 14 days or 1 month?
They have 10 days. It’s stated on the site under FAQs:
Click here to read the whole thing.
Once you click Accept & Review Order, you can provide feedback on your order. Feedback can be provided up to 10 days after the order is marked as complete. Once this timeframe is over the option to add feedback will no longer be available for either buyers or sellers.
Thanks for the update
@graphtersawyer has given you the answer. I would just add that you must not chase your buyer to leave feedback. It is up to them whether or not they choose to leave feedback or not.