My mother passed away last August and Probate was granted in December. I was chasing our solicitor (one of the executors) for a final figure for IHT yesterday and he said he would write to HMRC for an assessment. I am assuming Grant of Probate does not mean HMRC have agreed the IHT but how long should this take? This all seems very slow. I have 6 siblings all waiting for their share of the estate!!