EAIG17100 | Notifying assessments - forms, letters and schedules: Form EX601 - Officers assessment or civil penalty
From HM Revenue & Customs · Excise Assessments Interim Guidance
All excise assessments must be notified on Form EX 601 except
prime assessments generated centrally
those notified together with a customs debt on Form C18.
The form is the main accounting document for excise assessments and is used
to notify the debt to the person liable
to notify payment by the person liable, and
to update the excise accounting systems.
It is also used
to notify civil penalties, and
to authorise repayment of over-declarations.
You must also obtain an Assessment Reference Number for your assessment and follow the management control procedure before you notify the assessment, see EAIG31000.
You should send the form together with Form EX 603, an explanatory letter and a schedule of calculations.
The assessing officer
You are the assessing officer if you made the assessment that is to be notified on Form EX 601.