Proper S Corp Tax Reporting For QSSS Elections

My client had a Qualified Subchapter S Subsidiary(QSSS) election that took place on October 1, 2015 for 3 S Corporations. I’m thinking that I have to file a short year return for each S Corporation for January through September. Then, I will file under the parent company a consolidated return for the activity of the subsidiaries from October through December. Is that the correct way to handle s corp tax reporting for QSSS elections?