On 3 December 2019, U.S. Internal Revenue Service (“IRS”) updated its Frequently Asked Questions (“FAQs”) IDES Technical (Link). Question A16 in the section “General Questions” has been updated to support users in understanding the respective requirements:
Question A16: What XML Schema version for FATCA Reporting (Form 8966) is currently in use?
Answer A16: IDES only accepts FATCA XML Schema v2.0 files, as of January 2017, and files submitted using other than version 2.0 of the schema will generate error notifications. More information is available on the FATCA XML Schemas and Business Rules for Form 8966 page.
The IRS will conduct open user testing for all FATCA filers biannually. User participation in IDES open testing is voluntary. In order to participate in testing, filers need to have an active password. All passwords and profile information should be updated BEFORE the enrollment cutoff. Users should also verify that the digital certificate uploaded to IDES for their organization is valid. All testing sessions will be announced on the IDES Testing Schedule page.