If you work from home and are self-employed or earn 1099 income, you may be missing out on major home office tax deductions. Make sure you are providing your tax professional with a summary of the following payments for the year at tax time: all utilities (including trash), mortgage interest/rent, home owners/renters insurance, HOA dues, any improvements to the office space, and any repairs to the entire home (such as replacing the HVAC) along with square footage info.