There are simple answers (but hey, it's the IRS, is it really ever that simple??)
Gather your basic documents - your rental income and expenses - then start categorizing
- Which purchases were for operating expenses (utilities, HOA fees, etc)
- Which vendors will require a 1099 form in January?
- How many rental days was your property available?
The more complicated items take more planning
- Do you have major assets you purchased ?
- Did you make major improvements?
⇒ Fill out the appropriate forms for your rental income