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).

For details on scenarios and who is required to test, see Publication 5164, Test Package for Electronic Filers of Affordable Care Act (ACA) Information Returns (AIR) (October 2020) PDF.

Click on the link for “AATS General instructions PDF”.

Tax Year 2020/Processing Year 2021 AATS Testing will begin November 2, 2020.

AATS Scenarios

Tax Period AATS Known Issues and Solutions
1094B/1095B ZIP
1094C/1095C ZIP
2020 Update: TBD
Known Issues for Scenarios

Tax Year 2019/Processing Year 2020 AATS Testing will begin November 1, 2019.

Predefined AATS Scenarios
Instructions Predefined AATS Narratives Predefined AATS Answer Keys Tax Periods AATS Scenario Known Issues and Solutions
Predefined Scenario Instructions  PDF 1094B/1095B ZIP
1094C/1095C ZIP
1094B/1095B ZIP
1094C/1095C ZIP
2019 Update: 9/28/2020
Known Issues for Scenarios PDF
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  PDF 1094B/1095B  PDF
1094C/1095C  PDF
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. 2019

Update: 9/28/2020

Known Issues for Scenarios PDF

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

1094B/1095B ZIP

1094C/1095C ZIP

1094B/1095B ZIP

1094C/1095C ZIP

2018

Update: 11/01/2018

Known Issues for Scenarios PDF

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 PDF

1094B/1095B PDF

1094C/1095C PDF

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 PDF

 

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

1094B/1095B ZIP

1094C/1095C ZIP

1094B/1095B ZIP

1094C/1095C ZIP

2017

Update: 11/01/2018

Known Issues for Scenarios PDF

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 PDF

1094B/1095B PDF

1094C/1095C PDF

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 PDF

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

1094B/1095B ZIP

1094C/1095C ZIP

1094B/1095B ZIP

1094C/1095C ZIP

2016

Update: 01/19/2017

Known Issues for Scenarios PDF

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 PDF

1094B/1095B PDF

1094C/1095C PDF

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 PDF

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/1095B ZIP

1094C/1095C ZIP

1094B/1095B ZIP

1094C/1095C ZIP

2015

Known Issues PDF

ReadMe PDF

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