18-125-210 Me. Code R. § .05
Each telecommunications business must file an annual return by December 31 detailing its taxable property in the State, including the original and depreciated cost, the location of the property, and any other information required by MRS. For purposes of depreciation, the asset class lives set forth in IRS Publication 946 are generally used, but MRS may in appropriate circumstances modify those class lives to arrive at just value.
The annual return due December 31 is based on the status of the taxable property as of April 1 of that same year. MRS will mail assessments of telecommunications excise tax to telecommunications businesses by March 30 of the year following the due date of the return. Payment of the tax is due by August 15 following the March 30 assessment date.
18-125 C.M.R. ch. 210, § .05