I don't understand what date is entered as: 01/101/2019? Is it the 10th, the 11th, or the 1st of January in 2019?
Then, if the legal documents show that the S election happened before the initial incorporation, then it could be that they filed Form 2553 to actually create the corporation and elect to be an S corporation at the same time.
A corporation or other entity eligible to elect to be treated as a corporation must use Form 2553 to make an election under section 1362(a) to be an S corporation. An entity eligible to elect to be treated as a corporation that meets certain tests discussed below will be treated as a corporation as of the effective date of the S corporation election and doesn’t need to file Form 8832, Entity Classification Election.
If that is the actual situation, then you would use the date of the Form 2553 to be the date of incorporation and the date of the s election.
