Postal Service is ready for Tax Day

Last Updated on April 12, 2015 by cassnetwork

If you haven’t filed your taxes yet, the United States Postal Service is here to help. The deadline this year to file is Wednesday, April 15, 2015.

Because many customers file electronically, local Post Offices will maintain regular hours. For details on services and hours at neighboring Post Offices, please call 1-800-ASK-USPS (275-8777) or go to

The price to mail a one-ounce First-Class letter is 49 cents; 21 cents for each additional ounce. The cost to mail a one-ounce First-Class large envelope is 98 cents; 21 cents for each additional ounce.  The Internal Revenue Service (IRS) will not accept mail arriving postage due.

For last minute tax filers, the Self Service Kiosk (SSK) makes mailing and shipping easy and is available at select Post Offices. The SSK offers First-Class postage stamps, Certified Mail with Return Receipt, and Delivery Confirmation. Customers can weigh, mail letters and parcels using debit and credit cards when using the SSK. Next to the SSK is a collection box for depositing items. For tax filers, an April 15 postmark will be provided if the mail is deposited by the last pickup time posted on the SSK on April 15.

Tax mailing tips:

  • Taxpayers are urged to avoid typical errors made when mailing returns such as unsigned forms, insufficient postage, and depositing returns in collection boxes after the regular pickup time.
  • Use pre-addressed labels where possible. Write clearly. Take special care to ensure that handwritten envelopes are legible.  Include a return address.
  • Use First-Class postage. The Internal Revenue Service (IRS) recognizes the First-Class letter postmark as proof that a return was mailed on time.
  • Apply proper postage. Weigh any return that feels heavier than one ounce.
  • Rule of thumb — up to 5 sheets of 20-lb. paper using a number 10 envelope equals one ounce.
  • The IRS does not accept postage due mail even if it has the April 15 postmark. Tax returns with insufficient postage will be returned. IRS will penalize taxpayers for filing late tax returns.
  • Certified Mail with Return Receipt is a good choice for customers sending original receipts to tax agencies.
  • Make certain bulky envelopes are securely sealed using tape.
  • Postal regulations require that tax returns affixed with postage stamps weighing 13 oz. or more must be mailed at a Post Office.  They cannot be mailed in a collection box.