IHTM31191 | Assessing: COMPASS: calculations: notes
From HM Revenue & Customs · Inheritance Tax Manual
You can access the notes box through the button at the bottom of the assessment window. You can type a short note of no more than 192 characters (including spaces) in the box.
Press enter when you come to the end of each line of text.
Use the backspace key if you make any mistakes.
What you type here is how the text will appear on the printed calculation.
This box should only be used where the taxpayer or agent is expecting the calculation and that calculation is straightforward.
If you need to add a more substantial note, you should send a covering letter.
Choose ‘OK’ to return to the assessment window.