@mlfletch you will need an SAP Concur profile to do that. This Community and the profile you created here are not the same as an SAP Concur profile. First person I would recommend you talk to is your direct manager to see if you have an SAP Concur profile or if you need to submit a request to your company to get one set up. This Community won't be able to set you up with a profile to do your expense reports. It is something that needs to be done by someone at your company.
If your manager cannot help you, let me know.