ATTENTION CLIENTS: If you received a letter from the IRS stating that your tax return EXTENSION is INVALID because it was filed too late, PLEASE SEND US A COPY OF THE LETTER. The IRS used the “received date” instead of the “postmarked date” to determine if an extension was filed on time. Do not worry: your extension was filed on time! We are working with the IRS to resolve this issue. Thank you for your patience and understanding.