The IRS will lay off thousands of probationary workers in the middle of tax season, according to two sources familiar with the agency’s plans, and cuts could come as soon as next week.

The IRS will lay off roughly 7,000 workers in Washington and around the country beginning Thursday, a person familiar with the plans told The Associated Press. The layoffs affect probationary employees with roughly one year or less of service at the agency and largely include workers in compliance departments,