Hello, this is the flex team.
Thank you for using flex.
Starting July 31, 2025, HomeTax will mandate two-factor authentication for ID-based logins to enhance personal information protection. As a result, clients currently integrated with HomeTax via the ID/PW method (ID/password entry method) may experience login integration failures after this date. We recommend reviewing the information below and taking action accordingly.
1. Key Changes
Effective date: July 31, 2025 (Thu)
Affected: Clients using ID/PW method for HomeTax integration
Change details: Two-factor authentication will be added for HomeTax ID/PW logins.
2. Recommended Actions
① Switch to joint certificate integration method (Recommended)
Register a joint certificate on the [Integrate Financial Institution] screen to proceed with integration
This enables stable financial institution data collection without integration failures.
② If continuing with ID/PW method, disable two-factor authentication and re-integrate
After July 31, disable two-factor authentication directly on the HomeTax website, then re-integrate
If not disabled, data collection will be disrupted due to login errors.
👉 How to disable HomeTax two-factor authentication (Refer to the image below)

