Although my estimated and withholding taxes exceeded my 2018 Income Tax liability and TurboTax (using Premier/CD for Mac OS Desktop) indicated I DID NOT owe an underpayment penalty: I was, finally (after two unsuccessful attempts), successful in having my Federal and State Tax Returns"accepted; utilizing the method you indicated, above. The only ADDITIONAL step that I needed to do, was, also, to "check" Item "C" ("to have the IRS figure the penalty and send a bill if penalty due"; and located "above" Part I of Form 2210). And, as you indicated in your post: I decided NOT to take the "work-around" steps necessary to "delete" Form 2210 (and although not required by IRS), as TurboTax was already, by default, attaching it to the Tax Return... And, due to the additional "85% Waiver" provisions (electable via Part II, Box A) and provided in the Form 2210 (in the rare event that I might actually owe an underpayment penalty); and, also to "preserve" TurboTax's "100% Accurate Calculation Guarantee" (which I thought might risk being impacted, if inaccurate tax information/changes (associated with a "work-around") were pro-actively to be entered on the tax documents). In short, I thought is was a better option for the IRS to HAVE a Tax Form (that might ultimately be inapplicable and not needed) than to NOT HAVE the Form 2210, in case it might be needed for processing purposes----Plus, having (at least presently) the Form 2210 submitted, allows for successful e-file "filing" and "acceptance" (and avoiding delays ( and risk of other data-entry errors) associated with with "mailing and processing" of the Tax Returns).
