Tax return filing for 2026 (Reiwa 8): wider Mynaportal linkage and the switch to the "Myna app"Next year, filing your tax return on a smartphone will fill in more data automatically
On September 4, 2026 (Reiwa 8), the National Tax Agency published a page for filing tax returns for 2026 (Reiwa 8). From January 2027 (Reiwa 9), many more people are expected to be able to use Mynaportal (マイナポータル) linkage for salary information. The Myna app (マイナアプリ) became available on August 25, 2026, and people who file with their My Number Card are advised to update the app and complete registration.When you file a tax return, there is a function that automatically fills in information such as your salary and medical expenses from Mynaportal. The National Tax Agency announced that from January 2027 (Reiwa 9), more people will be able to use this method for salary information.
- 1. Update the appUpdate to the Myna app from the app store
- 2. RegisterComplete registration in the Myna app
- 3. Start filingStart using the tax return preparation corner
- Filing for 2025 (Reiwa 7)About 4.08 million people used Mynaportal linkage
- August 25, 2026The new "Myna app" becomes available
- From January 2027 (Reiwa 9)Even more people can use linkage for salary information