It only matters if you prefer one e-mail for use in the business you have set up.
Resolution for '2 email issue: 'I have 2 email addresses and don’t know which to use.' available: Yes.
The 2 email issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the 2 email issue yourself by looking for a resolution described in the article. If it is a complex 2 email issue or you are unable to solve the issue, you may contact us by clicking here or by using other 2 email support options.
For more information about resolving issues related to 2 email in Quickbooks/QBO or to get support for the issue 'I have 2 email addresses and don’t know which to use.', click the link below: