Schedules K-2 and K-3 are new for the 2021 tax year. If you have items of international tax relevance, you're required to report them on Schedules K-2 and K-3 if you file: Form 1065, U.S. Return of Partnership Income Form 1120-S, U.S. Income Tax Return for an S Corporation Form 8865, Return of U.S. Persons With Respect to Certain Foreign Partnerships To find out if you're required to submit Schedules K-2 and K-3, check the schedule instructions. How to Submit Schedules K-2 and K-3 with an Electronic Return During the Interim Period Modernized e-File (MeF)/Extensible Markup Language (XML) electronic filing capability for the schedules K-2 and K-3 for TY 2021 will not be available as of the beginning of the 2022 filing season (January 2022). Schedules K-2 and K-3 will be available for MeF/XML filing in the following timeframes. If you electronically file your return before the timeframes (Interim Period), submit the schedules as separate PDF files attached to the return. Find the schedules in Forms and Publications. Timeframe of Availability for MeF/XML Filing Schedules K-2 and K-3 Form Number Date Available Form 1065 March 20, 2022 Form 1120-S Mid-June 2022 Form 8865 January 2023 Recommended standard names for the PDF files will be posted to IRS.gov/mef. Taxpayers who are not required to complete the schedules K-2 and K-3 are not impacted by the above-mentioned timeline and may file their returns electronically from the beginning of filing season 2022. We've notified e-file providers about this timeframe. Forms and Instructions For the latest information on Schedules K-2 and K-3, see: Form 1065, U.S. Return of Partnership Income Form 1120-S, U.S. Income Tax Return for an S Corporation Form 8865, Return of U.S. Persons With Respect to Certain Foreign Partnerships Partnerships Help Find penalty relief information for the transition period in IRS Notice 2021-39PDF. For help with issues filing Schedules K-2 and K-3, email IRS Large Business & International (LB&I). We may not be able to respond to all emails.