If you've set a field to auto-enter the date on creation it will automatically enter the date for each new record you create via filemaker. If you import data from another source, such as an excel file, this date will also be auto-entered if you select that option during import.
Thus, I'm a bit confused as to what you mean by "These fields don't popuate when I hit ok,..." The OK button appears in all kinds of dialogs so I don't quite know which dialog you have open when you click OK and the field doesn't populate.
Please keep in mind that auto-enter settings won't affect records that are already in the database at the time you select the auto-enter settings for a field. In those cases, you'd need to use a method such as Replace Field Contents to update the field in the previously existing records.
Thank you, I think the Replace Field Contents step is what I was missing as I had already imported the file. I will give that a try now!