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TIN Comply has announced two free browser-based tools for businesses preparing 1099 information returns for the IRS Information Returns Intake System (IRIS): a file checker for IRIS-format files and a converter for legacy FIRE files. The tools address different steps, and the company says conversion output is checked but is not ready to file without review. The IRS says the FIRE system will stop accepting submissions on November 19, 2026, at 3 p.m. ET.
What TIN Comply announced
In an October 9, 2026 announcement, TIN Comply said both tools are available at no charge from its tools page, without an account or login. The capabilities and privacy details below are the company’s claims; they have not been independently tested.
IRIS 1099 File Checker
The checker is intended for files already formatted for IRIS. TIN Comply says it reads Taxpayer Portal CSV files and Application to Application (A2A) XML files, checks them against applicable IRS IRIS business rules, A2A schema requirements, and portal-template formatting, then reports errors and possible fixes. The company says it supports tax years 2022 through 2026. It also says the checker flags a 250-row portal upload limit and A2A’s 100 MB transmission limit; the 250-row figure is a vendor specification, not an IRS limit confirmed in the cited IRS guidance.
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Pub 1220 to IRIS Converter
The converter is for legacy FIRE files based on IRS Publication 1220 editions from 2022 through 2025. TIN Comply says it can produce IRIS A2A XML and Taxpayer Portal CSV output. It detects the likely Pub 1220 edition from the file records and asks the user to confirm; when the evidence conflicts, the company says it stops rather than guessing. It also reports mapping judgments and fields that have no direct counterpart, and checks the converted output.
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TIN Comply explicitly characterizes the result as “converted and checked, never as ready to file.” Treat that as an important distinction: a conversion or validation result does not establish that a return is complete, compliant with every current requirement, or successfully submitted.
When FIRE ends and what filers must do
The IRS says the last day to submit through FIRE is November 19, 2026, at 3 p.m. ET, as stated in IRS notice IR-2026-99, dated August 24, 2026. Current FIRE users must transition to IRIS for tax-year 2026 information returns during the 2027 filing season. This deadline concerns the FIRE submission system; it is not a general filing due date for every information return.
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The IRS describes two IRIS filing routes: the Taxpayer Portal and A2A. The IRS calls IRIS a free online portal for information returns for tax year 2022 or later, and says no special software is required to use the portal. See IRS Topic 801 and IRIS filing guidance.
Choose an IRIS filing route
| Route | What it is for | Requirements and limits |
|---|---|---|
| Taxpayer Portal | IRS online filing route; no special software is required for portal use, according to IRS Topic 801. | TIN Comply says its checker can review portal CSV files and flags a 250-row upload limit. The row limit is the vendor’s stated product specification. |
| Application to Application (A2A) | Programmatic transmission of information-return files to IRIS. | The IRS states a maximum transmission size of 100 MB. A2A filers must apply for an IRIS A2A Transmitter Control Code, obtain an API Client ID and schema package, and complete Assurance Testing System transmissions before production filing. |
The IRS says filers with 10 or more information returns must e-file for tax years beginning in 2023. Its count includes Forms W-2, which are filed with the Social Security Administration. Consult the IRS IRIS requirements and A2A instructions for the current rules and setup details.
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What to check before using a converted or validated file
- Review reported errors, warnings, and possible fixes against the return records and applicable IRS instructions; do not treat a tool’s pass or conversion result as proof that the filing is correct.
- Inspect any reported field mapping and unmapped data. A legacy field without a direct IRIS counterpart may require a filing decision rather than an automatic substitution.
- Confirm that the file is being prepared for the correct tax year and IRIS route. Portal CSV and A2A XML are different output formats.
- Check the current IRS schema and business-rule release before filing. The IRS schema index listed tax-year 2026 v1.2 in the Secure Object Repository on September 24, 2026, with production in January 2027; the IRS notes that versions and rules may coexist and packages may be updated. See the IRS schema and business-rules index.
- Complete the IRS A2A access and testing prerequisites if using A2A, then confirm successful submission through the IRS system. A file check alone is not a submission.
Privacy and availability claims
TIN Comply says the tools run JavaScript in the user’s browser, read files on the user’s computer, and do not upload or store them. These are statements in the company’s announcement, not independent security findings. Before processing sensitive taxpayer information, review the live tool’s privacy information and decide whether its handling meets your organization’s security and compliance requirements.
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