When this guide is useful
Guests and the owner use the same property during the year.
The distinction that matters
Track actual days and purposes before applying rental, personal-use and expense allocation rules. A platform calendar does not resolve every blocked day.
A worked situation to investigate
An owner blocks dates for family stays, maintenance trips and vacant days between guests.
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.