He said Task Forces. The only way to do this is the fourth tab (Naval Organization) on the Task Groups screen. Select the TG you want from the dropdown, then select your Task Force root element on the Naval Organization screen and press the 'Add TG' button. You can also add branches all up and down the chain and add ships and TGs directly to these branches. To actually move the TG to the selected TF, select the appropriate branch and press 'Branch Only'. This will create a new TG under the appropriate TF, containing the ships in the selected branch.