The Revenue Commissioners are warning it has the legal powers to gather the Property Tax from people who will not pay.
A major public information campaign on the new levy will begin in early March, with letters detailing the charge being dispatched before April.
Revenue said 1.6 million households in the country are liable for the tax, and even people seeking a deferral must complete the forms.
In the event of non-compliance, the levy will be deducted from a person's salary, bank account or social welfare payments.
There will also be an interest charge of 4% for people who get a deferral and 8% for people who do not pay.