From the Missouri Press Association
The deadline is Oct. 1 for giving your postmaster your Statement of Ownership, Management, and Circulation (PS Form 3526). The filing and publication of the information on this form are required if you have a Periodicals mailing permit. You can download the form from the Postal Service website.
Weekly papers need to publish the information in Form 3526 in any issue in October. Publications issued more frequently than weekly should publish the information by Oct. 10.
A copy of your filled-out Form 3526 can be published, or the information contained on the form can be published as text. Keep a copy of Form 3526 with your postal records.
The form allows you to report electronic subscribers, but electronic subscriber numbers are not entered on Form 3526. It reports only printed copies. Line 16 of the form has a box to check if you want to report electronic subscribers. Do not add electronic subscriptions to printed subscriptions on Form 3526.
The actual numbers for electronic subscribers should be entered on PS Form 3526-X. Fill out Form 3526-X only if you want to report electronic subscribers, which is optional. If you do not include electronic subscribers, submit only Form 3526.