@skohl - unfortunately, whether you walk though 2210 or assess whether you have a 'safe harbor' via what @Bees documented, it'll be important to take a stab at your 2019 liability. it doesn't have to be exact - just a good estimate. you can always adjust the estimate later. it's just critical to pay 90% of what is due to avoid any penalty.
Alternatively, you can just wait to pay anything until April 15, 2020 and pay the interest penalty for late payment.
the IRS is just concerned you pay what is due and pay with interest if enough hasn't been submitted quarterly.
