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HMRC internal manual

COTAX Manual

Repayments / reallocations: repayment interest: functions: calculating repayment interest

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.

The table below shows the function or functions to use in particular situations

Situation Function
To calculate repayment interest due for a manual repayment RINT (Repayment Interest Calculation)
To set-off non CT overpayments against a COTAX liability DSET (District Set-Off)