Update as of Friday, September 25, 2020:
The ISTQB has extended the online (remote proctored) exam availability until March 25th or 26th, 2021. That is the date on which they will be reviewing it as part of the Spring 2021 General Assembly.
If you have already purchased a voucher for an exam center, don't worry, you will be able to switch to an online exam, but you must cancel your testing center exam first. Remember to cancel your scheduled testing center exam 72 hours in advance of its date/time or you will incur a $75 fee.
If you have questions, the ASTQB and AT*SQA support teams will be happy to help with any questions on Monday during normal business hours."
The details for online exams are now on the AT*SQA website. There is a link at the top of the home page (https://atsqa.org) which explains the requirements and details.
The registration process is described at https://atsqa.org/istqb-exam-registration
If you have purchased a course that includes exams, and are ready for the voucher, just let me know and I will send it to you. If you need to purchase an exam, you can do that through me, or directly through the Kryterion web site as the last step in your registration.
Please feel free to ask me any further questions.