what is the difference between amortisation and impairment when they refer to an intangible asset as ,” The intangible asset should be carried at cost less AMORTISATION and IMPAIRMENT LOSSES.”
amortisation writes an asset off over its estimated useful life
impairment is a one-off to reduce the value of an asset when it is discovered that the carrying value is in excess of its recoverable amount
…and this is a matter which could have bee discovered by you with a little bit of initiative! And by watching the videos for F3 and / or F7 on this site