I am wanting to identify a quarter based on a date and have that formula working, but I also want it to return a value of "TBD" if the Start Date is not a date AND return a value of "Dates Invalid" if the Start Date is outside of the current year, which in this report is 2023. How can I adjust the formula below to incorporate TBD or Dates Invalid into the return?
=IF(ISDATE([Start Date]@row), IF(MONTH([Start Date]@row) <= 3, "Q1", IF(MONTH([Start Date]@row) <= 6, "Q2", IF(MONTH([Start Date]@row) <= 9, "Q3", "Q4"))))