1. According to the official TOEFL news, you can apply to cancel the test 10 days before the test date (excluding the test date and application date). If you successfully apply to cancel the exam, you will get a refund equivalent to 50% of the exam fee, and the remaining 50% of the TOEFL fee will be used to pay for your registration and reserve the seat in the examination room, and will not be refunded to you. Late registration surcharge will not be refunded. Refunds will not be processed automatically. After canceling the application online, you must fax the refund application to the TOEFL online test call center of the examination center of the Ministry of Education, including your NEEA ID card, name, birthday, signature, ID number and a copy of the certificate, and then call the call center to confirm the refund. The refund application form can be downloaded from the examinee's notes.
2. If the exam is within 10 days of the exam date, you can only change the exam without refund.
If you really decide to quit the exam, you must be decisive. I hope I can help you.