You need to nominate LodgeiT as one of your SBR Providers.
Then, you must complete settings by clicking to the Gear Leaver, and update your intermediary i.e. Tax Agent Profile.
Settings ? General
Settings ? Contact details
If you are the signatory of your company, and your company is the intermediary, you must add yourself as a Client so you can then select yourself as the signatory of your company.
Check that you have used the ABN associated with your TAN.