Form 2210, Part IV, Line 19
On the Federal Taxes tab -> Deductions & Credit -> Estimates and Other Income Taxes Paid -> Federal estimated taxes of 2020
I entered $24,000 for both the first and second quarter.

Unfortunately, Form 2210, Part IV, Line 19, column (a) shows only $24,000, not $48,000

Seems like a bug in 2210.
How can I get the full $48,000 to show up on line 19?