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HMRC internal manual

COTAX Manual

Accounting periods: accounting periods work lists: amend accounting period list (AAPR) functions

The table below tells you the function or functions to use in particular situations.

For details of how to access any of the COTAX functions, select ‘Index Of Functions’ on the left of the screen.

On accessing the function, system Help is available to you at function, screen, field and error message levels.

Situation Function
To log a return. LRTN (Log Return)
To amend or update the AP record. MAPD (Maintain AP Dates)
To enter a struck off date. ACTP (Amend CT Payer Details)