IHTM30374 | Special rules: Scotland - legitim
From HM Revenue & Customs · Inheritance Tax Manual
On a death in Scotland
The way this is dealt with for IHT purposes is governed by IHTA84/S147. Tax may be
repayable under IHTA84/S147 (2) when a claim for legitim is renounced or
payable under IHTA84.S147 (4) when legitim is claimed.
Interest on tax which is repayable or payable is governed by IHTA84/S236 (4):
tax payable under IHTA84/S147 (2) carries interest from the date on which the tax was paid
tax payable under IHTA84/S147 (4) carries interest from six months after the end of the month in which the death occurs.