NBR Chairman Md Abdur Rahman Khan said that employees at all tax, VAT and custom houses in the country had returned to work on Monday. There are no problems.”"The NBR has also returned to work. Earlier in the day, the Chief Advisor's Office had issued a statement warning of “severe” action if tax officials did not return to work. At the same time, the interim government declared NBR services “essential”, the statement said. As the government took stricter measures, the Anti-Corruption Commission (ACC) announced it had launched a graft investigation against six NBR officials.