The penalties for the late filing of PS Form 3602-NZ (Nonprofit USPS Marketing Mail) may vary depending on the specific circumstances and the policies of the United States Postal Service (USPS). In general, late filing may result in the loss of nonprofit pricing privileges, which means that the organization may have to pay higher postage rates for their mailings. It is recommended to contact the USPS or a postal services representative for more specific information on the penalties for late filing.