Services / Departments Child Support Office The child support office is located in Room 109 at the Highlands County Courthouse. Payments can be made at AMSCOT, MONEY GRAM, online at www.myfloridacounty.com or mailed in to FLSDU at P.O. Box 8500 Tallahassee, FL 32314. Payment histories are available at $1.00 per page. Florida Department of Revenue (850) 488-5437 Civil & Probate Fees |