Step 1: Open a child support case Step 2: Locate the noncustodial parent (NCP) Step 3: Establish paternity Step 4: File a support order Step 5: Set-up payment Unlike child support calculations, there is no specific formula to calculate alimony in Georgia.Learn about the kinds of spousal support in California, how judges decide the amount and duration of alimony, and whether you can change the award later. This list contains current links to state divorce forms where available. Some states may have additional requirements or restrictions. Georgia Child Support Calculator. GA moved to what is known as the "Income Shares Model" for calculation of child support. Apply online or print, fill out, and mail in one of the application packets below. Follow the instructions on filling out the application completely. (NOTE: Fill out this page only if your case involves child support.) FL-150.