To pay by BACS please use the details:
Sort code 083210
Account number 12001039
Account name HMRC Cumbernauld.
Please use your unique tax reference as your reference.
For alternative ways to pay please follow this link https://www.gov.uk/pay-self-assessment-tax-bill
You will need your unique tax reference when you make the payment. This can be found on your personal tax return or on the Accountancy Manager portal.