I made an eFiling for a provisional patent application while unregistered. Can I now register myself and link that filing to my USPTO account? I have found that it would be useful to have an account to make a minor change to the filing.
Yes. In a USPTO pdf it states -
"Once you have your Customer Number, you must also associate your current patent applications with it. . . . - Download and complete the Customer Number Upload Spreadsheet
To get more information and to download this form you can go to Electronic Business Center. People at the EBC are very helpful for this type of question. 571-272-4100. They are available by phone from 6:00 a.m. to 12:00 midnight, Eastern Time, Monday through Friday