When this guide is useful
Old returns and available depreciation schedules do not agree.
The distinction that matters
Reconstruct the asset history before proposing a correction. The applicable procedure may depend on the nature and years of the error; do not assume every issue is resolved by an amended return.
A worked situation to investigate
An investor supplies two returns but no asset schedule for a property first rented several years earlier.
The example is illustrative. Begin with the underlying event and its source documents, then separate missing facts from disagreements about their treatment. Work through the checks below in the order that matches your file, rather than treating a completed checklist as a tax conclusion.
Build a traceable handoff
Identify the affected person, entity or property and the relevant period. Keep original evidence, corrections and the reviewer's written conclusion connected. If the facts change after review, preserve the earlier version and ask whether the change affects implementation.