If you've printed an extension by selecting File, then Print Extensions, or have entered an amount in either
Balance due on extension (Force)
,
Corporate tax current year (Force)
,
Withholding tax current year (S Corp/Force)
or
Pass-through entity tax current year (S Corp/Force)
, the extended due date automatically appears in this box. Otherwise, enter the date to be used as the extended due date in the calculation of late-filing penalties and in the filing instructions. If this box is blank, it's assumed that the return wasn't put on extension.