Inheritance tax
Can someone explain to me, like I was 5, what i should expect as a tax bill. Mum died 9 years ago left everything to Dad, he passed 6 weeks ago, left everything to three kids of which I'm one. Solicitor says it's super complicated - a few bank accounts, life insurance and a house worth about 350k - they'll sort it all for us for about 18k, reasonable? It seemed simple but solicitor has bamboozled me with all these caveats to my understanding of IT as "40% of everything over 500k", and that hmrc will bankrupt me before I can get anything from the estate.
Edit: Thanks everyone for the advice, well wishes, both on here and by PM. I really appreciate you all taking the time to help