I don't have a penalty on Form 1040-SR, Line 38.
Since Turbotax didn't prepare a Form 2210 Part I and Part II, it's not possible to know exactly why a Form 2210 wasn't prepared. If I prepared the Form 2210 Part I, however, line 6 ( $ 471) would be equal to or more than line 9 ($ -3,530). The flowchart at the top Form 2210 then states "You don't owe a penalty. Don't file Form 2210 unless box E in Part II applies, then file page 1 of Form 2210". Box E in Part II would not apply to my tax returns.
Turbotax could probably be less opaque about the issue by preparing a Form 2210 Part I and Part II and then not sending that document to the IRS in your tax return. I also understand what the IRS is saying quite clearly ("Don't file Form 2210"), but what real harm is caused by filing a Form 2210 Part I and Part II that would clearly show you don't owe a penalty.
