Startup cost question. Incorporated in 2017 but opened in 2018

we incorporated in 2017 and when we went to file for an FEIN we listed a start date in 2017.  Due to delays in outside our control, we did not open till 2018.  Are all the expenses in 2017 considered Start-up and organizational and to be capitalized?  Or go by start day on FEIN application and those expenses after that date are all operating expenses and the 2017 return will operate at a loss? (ignoring any capital expenditures as these are balance sheet itims)