Affordable Care Act Assurance Testing System (AATS) Information Returns

Information for each tax year/processing year is listed below. You will also find the scenario narratives and answer keys (if applicable).

Publication 5164, Test Package for Electronic Filers of Affordable Care Act (ACA) Information Returns (AIR) has additional details on the different scenario types and who will be required to test for each tax year.

Tax Year 2018/Processing Year 2019 ACA AATS Testing will begin November 2, 2018. More detailed information will be forthcoming.

Predefined AATS Scenarios        
Instructions Predefined AAT Narratives Predefined AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Predefined Scenario Instructions 

1094B/1095B

1094C/1095C

1094B/1095B

1094C/1095C

2018

Update: 11/01/2018

Known Issues for Scenarios

Criteria-Based AATS Scenarios
Instructions Criteria-Based AATS Narratives AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Criteria-Based AATS Scenarios Instructions

1094B/1095B

1094C/1095C

N/A: Criteria-Based Scenarios do not have Answer Keys since the transmitter has more flexibility in the data that is submitted. Please refer to Publication 5164 for more details.

2018

Update: 11/01/2018

Known Issues for Scenarios

 

Tax Year 2017/Processing Year 2018 ACA AATS Testing will begin in October 31, 2017. More detailed information will be forthcoming.

Predefined AATS Scenarios        
Instructions Predefined AAT Narratives Predefined AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Predefined Scenario Instructions 

1094B/1095B

1094C/1095C

1094B/1095B

1094C/1095C

2017

Update: 11/01/2018

Known Issues for Scenarios

Criteria-Based AATS Scenarios
Instructions Criteria-Based AATS Narratives AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Criteria-Based AATS Scenarios Instructions

1094B/1095B

1094C/1095C

N/A: Criteria-Based Scenarios do not have Answer Keys since the transmitter has more flexibility in the data that is submitted. Please refer to Publication 5164 for more details.

2017

Update: 11/01/2018

Known Issues for Scenarios

Tax Year 2016/Processing Year 2017 ACA AATS Testing will begin in early November 2016. More detailed information will be forthcoming.

Predefined AATS Scenarios        
Instructions Predefined AAT Narratives Predefined AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Predefined Scenario Instructions 

1094B/1095B

1094C/1095C

1094B/1095B

1094C/1095C

2016

Update: 01/19/2017

Known Issues for Scenarios

Criteria-Based AATS Scenarios
Instructions Criteria-Based AATS Narratives AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Criteria-Based AATS Scenarios Instructions

1094B/1095B

1094C/1095C

N/A: Criteria-Based Scenarios do not have Answer Keys since the transmitter has more flexibility in the data that is submitted. Please refer to Publication 5164 for more details.

2016

Update: 01/19/2017

Known Issues for Scenarios

Tax Year 2015 ACA AATS was open for testing in early November 2015 for Information Returns that will be processed in 2016.

IRS opened AATS in November using a Character-by-Character Comparison tool, however testing has migrated to a more robust environment in January that include Business Rules validations. Special instructions are included in the ReadMe files providing an explanation of the AATS functionality now available. Please review the appropriate ReadMe file before programming the AATS scenarios.  Links for the ReadMe files can be found in the Comments section below.

AATS Scenarios

AATS Scenario Forms AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions Comments

1094B/1095C

1094C/1095C

1094B/1095B

1094C/1095C

2015

Known Issues

ReadMe

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