I'm not sure what you had entered before you "put the UK tax in the correct place." Had you already entered the rental income on Schedule E? If not, when you entered it, it would be included in your Georgia income (assuming you are a Georgia resident). Without something like a foreign tax credit on the Georgia return, that would certainly increase your Georgia tax. I'm not familiar with Georgia taxes. I don't know if Georgia has an equivalent of the federal foreign tax credit to offset Georgia tax on foreign income on which foreign tax was paid, or whether the federal foreign tax credit flows to the Georgia tax return in any way. Maybe @DoninGA can help with this.
