Remove pricing errors and ensure all opportunities on the same Account use the same Price Book. This is done via a custom field on the Account. Use the field to specify the Price Book that applies to each Account.
We show Salesforce accounts that are linked to Trailblazer.me and have the Manage Billing permission. If your account is missing, check that you connected the account to your Trailblazer.me profile. Then verify that you’ve been assigned the Manage Billing permission in the related org.