Once the REIT has determined that it has failed one or both of the income tests for the year, it is required to file a schedule describing each item of its gross income that would qualify for the failed test (or tests) in order to avoid disqualification.3
If the failure is due to willful neglect, the REIT will be disqualified and will be taxed as a regular corporation the tax year, and for four years following the year of disqualification.4
1. IRC § 856(c)(6).