D.C. Code § 47-1804.06: Authority to reject returns.

Notwithstanding any other provisions of this chapter, the Mayor is hereby authorized to reject any return of income reported on a cash basis where, in his opinion, the net income of the taxpayer is not properly reflected and cannot be determined on such basis, and to require the return to be filed on such a basis as in his opinion will properly reflect the net income of the taxpayer.