Is the "date business began" when we incorporated or when we shipped our product?

[stqsas]

We incorporated our business last year (2017), but did not ship our product and begin earning revenue until this year (2018).

The question: is our "date business began" last year (when we incorporated) or this year (when we shipped and started earning revenue)?

We thought it be this year (2018), but TurboTax seems to get confused when we enter this year's date.  It asks us to review it because "You entered a date the business began that is later than December 31, 2017", and if you confirm then the calculations and forms later don't seem to work (especially for the "short year" part of the business info form).

Any guidance would be appreciated, thank you.

[Tonita]

Please see the answer below from TurboTax PartriciaV:

https://ttlc.intuit.com/replies/4858013