NFU Scotland president Martin Kennedy said: "The fight's not over. We now have to change the minds of politicians as a lot can happen before the family farm tax reaches primary legislation in 2026."
Scottish farmers have the 'momentum and hunger' to continue lobbying the Government with the hopes of overturning the family farm tax.
NFU Scotland president Martin Kennedy said there was still an appetite among farmers to influence Government officials and politicians until Chancellor Rachel Reeves 'listens' to the industry and overturns measures in the Budget include a 20% taxation on inherited agricultural assets and properties.
Earlier this month, a Conservative Party motion to stop the family farm tax was rejected by 339 MPs, including Defra Secretary Steve Reed and Farming Minister Daniel Zeichner, to 181 in the House of Commons.
Speaking at a press briefing in Edinburgh on December 10, the tenant farmer from Aberfeldy in Highland Perthshire was critical of Defra's position on Inheritance Tax since the announcement of the UK's Autumn Budget.
"There has been been radio silence from Defra since Rachel Reeves' Budget earlier this year which has been quite disappointing," he added.
"When we spoke to the Farming Minister prior to the UK Budget, we had assurances that they were on the side of British farmers and fully understood the damaging impact of taking away APR.
"But Defra is doubling down on what they have said since our meeting.
"The farming industry has been frustrated that there was no consultation prior to its announcement.
"It should never have been announced in the Budget without at least some form of consultation."
The Scottish beef and sheep farmer said Inheritance Tax concerns laid solely at the doors of Westminster.
"We have Holyrood on side," he said.
"The issue is not with Scottish Parliament, it is with Westminster.
"We strongly oppose the facts and evidence presented from the Treasury on the number of businesses which is nowhere near the mark we believe.
"They have completely missed the impact it will have on small family farm businesses."
Mr Kennedy said he was proud to have witnessed a demonstration of strength from the farming industry with a number of protests held in London and Edinburgh last month.
"I have never seen such a sense of feeling from the farming community in my lifetime on an issue," he added.
"It was absolutely fantastic to see farmers coming together this way. All four farming unions are singing from the same hymn sheet.
"We now have to change the minds of politicians as a lot can happen before the family farm tax reaches primary legislation in 2026.
"We must build our case with facts and evidence which will take time.
"It should not be rushed and must be done in the right way to provide the outcome we all want, which is to see the family farm tax ended.
"The fight is certainly not over and we know there is appetite to undertake further lobbying events across the UK in the very near future."
Mr Zeichner said he continues to stick by the Chancellor's Budget.
Mr Reed said the UK Government remains 'steadfast' in its commitment to British farmers with the 'largest ever' farming budget of £5bn provided to the sector over the next two years.
