Hi
If the property that was disposed of was part of the estate of the deceased, the estate will need to calculate whether there is any capital gains tax to pay.
If there is, the estate will need to pay it. If the property was bequeathed to beneficiaries of a will, such as the deceased's children, then on the death of the deceased, the property became an asset of the beneficiaries.
When the property is disposed of, the each of the beneficiaries will need to work out if they had a capital gain liability arising from their share of the disposal.
In either case, any capital gains tax payable will need to be reported and paid withing 60 days of the completion date.
Please have a look at
Tax when you sell property
There is a calculator that should help work out if there is a gain, as well as gudiance on reporting and paying any capital gains tax due.
Thank you