Filing taxes is never a worry-free task, but for some taxpayer, the 2014 tax season just got a little more stressful. The Internal Revenue Service (IRS) is reporting that a major cyberbreach has compromised the sensitive information of as many as 100,000 American taxpayers, according to comments made by U.S. IRS Commissioner John Koskinen on May 26.

Among the information potentially compromised were Social Security numbers, birthdates and addresses. The IRS says that while hackers made over 200,000 attempts to access information, only around 100,000 households were affected.