Inheritance tax changes announced by the chancellor last October have thrown Welsh family farms into "turmoil", a farming union has said.
The plans to tax inherited agricultural assets worth more than £1m at a rate of 20% were announced in Rachel Reeves' first Labour Budget.
NFU Cymru President Aled Jones told MPs, on Wednesday, there was a need for "compassion" as "vulnerable people" were in the "eye of the storm". He suggested there was another way the Treasury could raise the £2bn a year involved.
The UK government has defended its inheritance tax reforms, describing them as "vital".
There were protests across the UK after the Budget announcement that inherited agricultural properties worth more than £1m would be subject to inheritance tax at 20% – half the usual rate – from April 2026.
The UK government has said the changes will only affect the wealthiest 500 farms each year, but farming groups argue as many as 70,000 could be affected.