Yes, you can deduct the real estate tax paid, since it was actually paid to the county - I am assuming it was paid in 2016...
You do not need to submit any documentation to prove the payment, but please do keep the closing document for your records to support the real estate payment in case you are requested to prove it. Data entry is as follows:
- Federal Taxes
- Deductions & Credits
- Your Home
- Property Taxes
