Due dates for returns and extensions for 1120 Florida

For tax years ending June 30, the due date is on or before the 1st day of the 4th month following the close of the tax year. For all other tax year endings, the due date is on or before the 1st day of the 5th month following the close of the tax year.
If the business is required to file and pay electronically, the payment would need to be initiated no later than the business day prior to the due date by 5:00 PM ET so the payment can settle on the said due date.
If the due date falls on a Saturday, Sunday, or a federal or state holiday, the return is considered to be filed on time if postmarked on the next business day.
Extensions are valid for 6 months, except for calendar tax year extensions that are 5 months and June 30 tax year extensions that are 7 months. Florida permits only 1 extension per tax year.
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