Is there an easy way to include an Intelligent Mail Barcode into a letter/envelope or label. either via writer or an libre addon extension. thank you

Just trying to make my letters look more professional and form like with adding the newest USPS barcodes and have them accurate. something simple like a novice like me can impliment easily.

There is one Testbed here in AOO which should work with LO too.

Check out the answers in this question.