Aren't you already listed as the Primary User, since you are able to sign into the program?

ProConnect is online but not fully compatible with mobile devices.  (Although it works for the most part from personal experience, I wouldn't use it to do anything important or what may require heavy lifting.  If I must, I'd use Chrome and Firefox as the mobile browser.)

In case you have any more problems, stick to using your computers and only those that meet the specifications listed in this article: https://accountants.intuit.com/support/en-us/help-article/product-system-requirements/system-require...

Please feel free to come back if you need more help.  Welcome to the mad house!