USPS Postmark Changes May Affect Mailed Tax Payments
Traditionally, a U.S. Postal Service (USPS) postmark has shown the date when mail was deposited in a mailbox or submitted at the post office counter. However, USPS recently updated its published guidance on what a postmark date represents.
According to Florida law, tax returns and payments mailed through USPS are timely if they are postmarked on or before the due date. If a tax return or payment is postmarked after the due date, it may be considered late and subject to penalties and interest.
USPS has updated its Domestic Mail Manual to explain that a postmark date on most mail reflects the date the item is first processed at a postal facility, not necessarily the date it was placed in a mailbox or collected by a mail carrier.
Please see the attached document for additional information to ensure your payment is credited correctly.