Form guide
Form IHT422IHT422
Gets the inheritance tax reference number you need before you can pay the tax.
United KingdomLegalHMRC
Updated by HMRC on June 5, 2026
Version last read from the agency on September 28, 2026
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Related documents
All forms- Form C1C1The Scottish confirmation application — the equivalent of probate north of the border.
- Form IHT400IHT400The full inheritance tax account for an estate that owes tax or is too large for the short form.
- Form IHT402IHT402Transfers a late spouse's unused inheritance tax allowance to the surviving partner.
- Form IHT403IHT403Lists the gifts the deceased made in the seven years before death.
- Form IHT406IHT406Declares the bank and building society accounts held by the deceased.
- Form IHT407IHT407Declares household contents and personal belongings — furniture, jewellery, a car.