Md. Code, Tax - General § 13–714

(a) For reasonable cause, a tax collector may waive a penalty under this subtitle.

(b) The Comptroller shall waive any penalty under this subtitle for a person’s failure to pay income tax when due under this article if:

(1) the unpaid income tax is due for a taxable year during which the person owing is incarcerated; and

(2) the person applies for and is placed on an installment payment plan under the Income Tax Reconciliation Program established under § 2–120 of this article.