Last year's taxes were done by someone else, and I only have the 1040 form (no worksheet). It looks like the preparer entered the full amount in Box 1: Gross distribution on line 4b "Taxable amount" on the 1040 form. So, I will just say that the entire Box 1 amount for 2019 is taxable too.
You've been very helpful! Thank you again, macuser_22!
