The National Tax Agency restarted its e-Tax online filing system at 11 a.m. on November 5, the agency said on its official X account. It said it had confirmed that no taxpayer information leaked.
e-Tax is the system through which individuals and businesses file national tax returns and pay taxes online. The agency had suspended the service around noon on November 4, saying it had detected suspicious communications and was carrying out equipment maintenance to investigate.
In its November 5 notice, the agency said the necessary measures and safety checks were complete. It said it would keep working to provide a stable and secure service.
The outage ran through the evening of November 4, when the agency said at 7 p.m. that the service was still down. Users had reported being unable to complete year-end tax adjustment paperwork while the system was offline.