What about the estimated taxes that are due in April? Can they also be made late? If you don't know your 2019 taxes, you can't use the safe harbor of using 100% (or 110%) of your 2019 taxes as your 2020 estimate.
Although Tunnelblick is named in the article, it uses Sparkle securely (https: always) and is not vulnerable to these attacks.
What about the estimated taxes that are due in April? Can they also be made late? If you don't know your 2019 taxes, you can't use the safe harbor of using 100% (or 110%) of your 2019 taxes as your 2020 estimate.
Although Tunnelblick is named in the article, it uses Sparkle securely (https: always) and is not vulnerable to these attacks.