Hi Michael & Teresa,
Trulia pulls the data from public info.
If the Hillsborough County Property Appraiser's website shows 3 bathrooms then that may be why Trulia shows 3.
You may want to be cautious about notifying the Property Appraiser's office because once they are aware there is a 4th bathroom then they will likely increase your assessed value and your property taxes will increase!
Genuine buyers will typically be working with a Realtor and those buyers will not really care if the public records and/or Trulia and Zillow have incorrect data. Buyers that get a mortgage to purchase will also have an appraisal done by the lender's appraiser so the appraiser will determine the market value on the actual measured square feet, # of bathrooms, upgrades, etc.
If you would like help selling your property, we offer a variety of selling options, not just the standard 6% that many Realtors may want to charge you.
All the best,
Alma and Teresa Kee