I had the same problem in ProSeries Professional with an amended 2021 return that I did not originally file.  I was able to successfully file another amended return, same year previously.  This file had the same Error Code IND-463.   2 1/2 hours on the phone with tech support and no resolution.  I called back and got another rep who said IND-463 is an IRS code and I should call the IRS.  Unfortunately the IRS Eservices help desk was closed for the day (and it's Friday).  Will call on Monday and let you know what the IRS says.

I am also going to start another file from scratch and try the process again in case the multiple Error messages from Intuit are preventing this file from being successfully transmitted.  Either way, I'll let you know how it is resolved.