R.I. Gen. Laws § 44-26-8 — Failure to file

If any corporation is required under this chapter to file a declaration of estimated
tax for any taxable year at any time on or before the fifteenth day of the tenth month
of the taxable year and the corporation fails to file any declaration, although the
declaration may otherwise be late, on or before that date, there shall be assessed
as a penalty against the corporation an amount equal to five percent (5%) of the tax
imposed upon the corporation for the taxable year. The tax administrator may waive
the penalty, if it is shown to his or her satisfaction that the failure to file the
declaration was due to reasonable cause and not to willful neglect.