I have a post office box for my firm's mailing address.  My account within Intuit has the correct addresses, both physical and mailing.  On my EFIN registration with the IRS, both addresses are also on file, physical address and the post office box for mailing.  I cannot get the PO box to update on my forms within ProSeries, so am printing and applying labels where necessary.  Very costly and time consuming!  I can't seem to get an answer from Intuit on this.  Any assistance is greatly appreciated!