Once you receive an EIN (Employer Identification Number) from the IRS (Internal Revenue Service), the EIN cannot be changed. However, you can update information that is associated with the EIN, such as the Principal Officer for the business, the business address or the name of the business.The IRS has implemented a protocol that will allow you to update your EIN with ease.tate the updated address for the business if you are writing to update the business address. Include any updated changes to the business name, if applicable. Make a copy of the letter to maintain for your own records.
Medium Flat Rate Boxes cost $12.35 when you purchase the postage at a USPS retail outlet, or $11.30 if you get the postage online. That online cost can be improved if you have a commercial account or use an online discount postage provider. Both access discounts accorded for volume shipments.
New prices effective as of 1/17/2016! 1  Small Flat Rate Envelope. 2  Flat Rate Envelope. 3  Legal Size Flat Rate Envelope. 4  Padded Flat Rate Envelope. 5  Small Flat Rate Box. 6  Medium Flat Rate Box. 7  Medium Flat Rate Box (2) 8  Large Flat Rate Box.