The IRS released updated versions ACA reporting forms and instructions on October 5th, 2015.
Time is of the essence to review the instructions and begin preparing for the reporting deadlines.
The forms released for employers are:
IRS Forms and Instructions for 1094-C/1095-C
http://www.irs.gov/pub/irs-pdf/i109495c.pdf
1094-C - Transmittal of Employer-Provided Health Insurance Offer and Coverage Information Returns
https://www.irs.gov/uac/About-Form-1094-C
1095-C - Employer-Provided Health Insurance Offer and Coverage
https://www.irs.gov/uac/About-Form-1095-C
Question and Answers on Shared Responsibility and Transition Relief:
https://www.irs.gov/Affordable-Care-Act/Employers/Questions-and-Answers-on-Employer-Shared-Responsibility-Provisions-Under-the-Affordable-Care-Act
Applicable Large Employer Information Center:
https://www.irs.gov/Affordable-Care-Act/Employers/ACA-Information-Center-for-Applicable-Large-Employers-ALEs
Updated ACA Forms and Filing Deadlines as of January 1, 2016: