Sorry, not possible.  The Accountant’s edition can import a file from one year older but not the other way around.  Your accountant will have to upgrade to either QB 2016 or 2017.

Resolution for '2016 or 2017 issue: 'Is quickbooks pro 2016 compatible with quickbooks accountant 2015 version?' available: Yes.

The 2016 or 2017 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 2016 or 2017 issue yourself by looking for a resolution described in the article. If it is a complex 2016 or 2017 issue or you are unable to solve the issue, you may contact us by clicking here or by using other 2016 or 2017 support options.

For more information about resolving issues related to 2016 or 2017 in Quickbooks/QBO or to get support for the issue 'Is quickbooks pro 2016 compatible with quickbooks accountant 2015 version?', click the link below: