IHTM43064 - Other issues: excepted estates and transferable nil rate band
The limit for excepted estates remains at the single IHT nil rate band available to every individual, irrespective of whether or not there is any unused nil rate band to transfer. Where changes in an estate mean that it is no longer excepted - but there will still be no tax to pay because of the transfer of unused nil rate band, you should proceed as follows.
You should continue to accept a Corrective Account delivered with an IHT205 as a full ‘account’ for these cases [IHTM06034] and in addition, the personal representatives should make a claim on form IHT216 [IHTM43006]. When you receive all these documents, you should deal with the claim in accordance with IHTM43010.