Spoke with helpdesk and after trying to enter a RepID that I do not use for this account, I did figure it out on my own.  If you have an account number and a web access code, create your file, but before uploading open with Notepad and change the Transmitter account number to match the account number on your letter (or the one you use to sign in).  I just had to change the RP0001 to RZ0001, then save and upload.  Mine then went through.  Hope this helps others.