R.I. Gen. Laws § 44-11-19 — Supplemental returns — Additional tax or refund

(a) Any taxpayer who or that fails to include in the return any items of income or assets
or any other information required by this chapter or by regulations prescribed in
pursuance of this chapter shall make a supplemental return disclosing these facts.
Except in the case of final federal adjustments that are required to be reported by
a partnership and its partners using the procedures under subsection (b), any taxpayer
whose return to the collector of internal revenue, or whose net income returned, shall
be changed or corrected by any official of the United States government in any respect
affecting a tax imposed by this chapter including a return or other similar report
filed pursuant to IRC section 6225(c)(2), shall, within sixty (60) days after receipt of a notification of the final adjustment
and determination of the change or correction, make the supplemental return required
by this subsection.
(b) Except for the distributive share of adjustments that have been reported as required
under subsection (a), partnerships and partners shall, within one hundred and eighty
(180) days after receipt of notification of the final federal adjustments arising
from a partnership level audit or an administrative adjustment, make the supplemental
return and make payments as required by this subsection.
(c) Upon the filing of a supplemental return the tax administrator shall examine the return
and shall determine any additional tax or refund that may be due and shall notify
the taxpayer. Any additional tax shall be paid within fifteen (15) days after the
notification together with interest at the annual rate provided by § 44-1-7 from the original due date of the return for the taxable year to the date of payment
of the additional tax. Any refund shall be made by the tax administrator together
with interest at the annual rate provided by § 44-1-7.1 from the date of payment of the tax to the date of the refund.