Islamabad: For facilitation of the taxpayers, FBR has directed that all Large Taxpayers' Offices (LTOs), Medium Taxpayers' Offices (MTOs), Corporate Tax Offices (CTOs) and Regional Tax Offices (RTOs) shall remain open on Saturday and Sunday, the '30th and 31st May, 2026. These offices will observe 30th and 31st May, 2026, Saturday and Sunday as normal working days for collection of duties and taxes.