Update in case it may help someone: I gave up waiting for a solution and entered a value for the Type of Property Sold question TurboTax was looping on. I decided to risk that the $0 values for the sale would be accepted and the unneeded type of property code would be ignored. Once this was done, the OK taxes passed TurboTax's review and I was able to file them electronically. Lo and behold, when I printed the filed forms for record, Form 561-NR was not included! TurboTax properly determined that, with no OK capital gains to report, the form was not needed. Therefore I should not have to worry about the inconsistent data (Type of Property Sold code on a $0 entry on Line 3) causing the return to be rejected.
Oh, in my original message I forgot to say that it was TurboTax Premier that I am using. @BillM223
