I have nothing to add to Buenchico's answer. The process is, for most of us, straightforward. The forms can be downloaded. Most of us have personal items and furniture which quite frankly, second hand, are virtually worthless. Valuable items need more care. Most domestic houses are easily valued by reference to estate agent sites displaying similar properties in the same area. The land registry will also divulge how much properties sold for in the same area over recent years. One caution - it occurs to me that although the IR seem to accept any reasonable valuation, once probate has been granted the sale of the property may attract a higher price and may attract capital gains tax.