You can print your own Flat Rate Box labels and postage at the USPS site. The site is very user-unfriendly and a cyber nightmare. For instance, your password has to be eight charactors and include one digit and one capital letter. WTF.
Anyway, it took four attempts to print my label. Each time, but the last, it failed to print, I had to retype some of the data and look for potential errors among the many pages on that site, most of which are not linked to each other. Using the back button can reset a bunch of data. The only bright spot is that it appears that I sent a $11.20 Medium Flat Rate Box for free. The account page says every charge was cancelled. I have no idea how to reproduce that zero cost result again. Just hoping my bank statement isn't three pages long with USPS charges.
Anyway, it took four attempts to print my label. Each time, but the last, it failed to print, I had to retype some of the data and look for potential errors among the many pages on that site, most of which are not linked to each other. Using the back button can reset a bunch of data. The only bright spot is that it appears that I sent a $11.20 Medium Flat Rate Box for free. The account page says every charge was cancelled. I have no idea how to reproduce that zero cost result again. Just hoping my bank statement isn't three pages long with USPS charges.