TIN Validation Error AIRTN500 – Next Steps

*Note – This article is for Tax Year 2015. Guidance for Tax Year 2016 is located here:

TIN Validation Error ‘1095C-010-01’ and ‘Shared-008’ Next Steps

One of the most common ACA e-filing errors returned from the IRS AIR system is the TIN Validation Error AIRTN500.

What causes TIN Validation Error AIRTN500?

This typically happens when the last name and SSN submitted in your filing doesn’t match what the IRS has on file. This can happen for the following reasons:

  • A maiden name was used when married name is registered with the SSA (or vice-versa)
  • A Hispanic last name was used where 2 last names are common. The first last name listed in the last name field must be the one registered with the SSA.
  • A covered individual’s last name or SSN can cause this issue, and (unfortunately) the IRS does not tell us whether an employee or covered individual triggered the issue.
  • An employer EIN mismatch on the 1094-C in Part I and also in Part IV of the 1094-C for Aggregate ALEs. This can also cause TIN validation errors in the associated 1094-Cs for remaining ALE members.

Continue reading TIN Validation Error AIRTN500 – Next Steps

BoomTax 1095-C Import Spreadsheet Format Guidelines

To help you quickly and easily import your employee data, we have created an Excel spreadsheet template that contains all of your 1095-C data in a standard format. This format closely mirrors the 1095-C forms, so your benefits / payroll provider should be somewhat familiar with the information required to populate this spreadsheet.

Continue reading BoomTax 1095-C Import Spreadsheet Format Guidelines

Updated ACA Deadlines Announced for TY 2015

On December 28th, the IRS released updated ACA deadlines as follows:

  • Deadline to distribute Form 1095-C to employees and covered individuals

March 31, 2016

  • Deadline to paper file with the IRS

May 31, 2016

  • Deadline to E-file with the IRS

June 30, 2016


The IRS has also noted that extensions will not be available in addition to the new deadlines:

Importantly, the IRS explained that because the new deadlines are available to all filers and are more favorable than the extensions that were otherwise available, no additional automatic or permissive extensions will be granted.

The importance of filing by the new deadlines cannot be understated, as the IRS is applying a good faith compliance standard to all timely filed forms reporting 2015 information.  Under this standard, the IRS will not assess a penalty for incomplete or incorrect information on the reporting forms as long as the forms were filed on time and the filer can show that it completed the forms in good faith.


Accordingly, BoomTax has updated our recommended deadlines as follows:

  • Recommended day to have filing prepared (to allow enough time to create employee copies)

March 15, 2016

  • Final date for print and mail requests. Orders are processed as first come first serve. Orders that are placed after this date have a greater chance of missing the employee copy deadline.

March 20, 2016

More information here: