Mushak 6.6 is the official VAT Deduction Certificate prescribed by the National Board of Revenue (NBR), Bangladesh. This form is issued by a withholding entity (such as government offices, semi-government organizations, autonomous bodies, or other designated entities) to a supplier or service provider when VAT is deducted at source. The form specifies details including the name and VAT registration number of both parties, invoice number, transaction value, VAT amount deducted, and the date of deduction. It serves as an essential document for suppliers to claim input VAT credit and for buyers to demonstrate compliance with VAT withholding requirements. By maintaining Mushak 6.6, businesses ensure transparency, proper record-keeping, and adherence to Bangladesh VAT law, while also avoiding disputes during audits or tax assessments.