こんにちは、うりぼうです。
IRSウェブサイトにて8月17日から8月31日までの試験中止の公表がありましたので共有です（該当箇所から抜粋）。
3. How can I get more information or schedule an appointment by phone if I live overseas? (updated 7/1/20)
Testing overseas for the Special Enrollment Exam (SEE) between June 1, 2020 through February 28, 2021 is available at the locations and dates below:
Seoul, Korea
Tokyo, Japan
Toronto, Canada
London, England
Bangalore, New Delhi, and Hyderabad, India
The August 17-31, 2020 international testing window has been canceled due to COVID-19 travel and safety restrictions. International candidates are able to schedule in the two remaining windows shown below.
International candidates who have a SEE exam scheduled during the August window will receive an email informing them that their appointment has been impacted. They will automatically be rescheduled into the November 2-16 window. If the new appointment date and time does not work, candidates can reschedule their exam . Currently, rescheduling fees are being waived. Or candidates can contact the call center at 1-800-306-3926 (toll-free) or +1 443-751-4193 (toll), M-F 8 am-9 pm ET and request a refund.
https://www.irs.gov/tax-professionals/enrolled-agents/enrolled-agents-frequently-asked-questions
もし、8月中に予約されている場合は11月2日から11月2-16日のwindowに自動的にリスケジュールされることとなります（Prometricから届いているであろうメールをご確認ください）。
しかしながら、自分で希望日に変更できるとのことで追加料金もかかりません。
座席に余裕があれば可能の意と考えられるため、早めにご確認ください。
以下、ご参考までに変更後のスケジュール表になります。
