The Property Sales campaign is aimed at people selling property in the UK or abroad where capital gains tax (CGT) should be paid, the Telegraph reports.
This applies to any property that is not a main residence, including holiday homes.
Gary Ashford, a spokesman from the Chartered Institute of Taxation, said: “The main target will be those selling second properties or those people who have invested in property, including buy-to-let landlords.”
People have until August 9 to tell HMRC about any unpaid capital gains tax on property sales and must pay any tax owed by September 6.
People don’t need to be concerned about the sale of their main home, which is usually exempt from CGT.
Those who come forward voluntarily will pay a lower penalty than if HMRC approaches them first.
Marian Wilson, head of HMRC campaigns, said: “Some people will not understand that selling a second home, a holiday home or a property disposed of as a gift could attract Capital Gains Tax. They need to look at our website or contact us.
“It is better to come to us before we come to you.”
