WAs this sales tax, property tax, or income tax.
Georgia has a 6 year statue of limitations on income tax. However, where there is ommission or fraud suspected, the statute doe not apply.
For sales tax, there is no statute of limitations. Failure to pay sales tax in Georgia is considered an act of ommission.
A lot of states are coming forward now and grabing back taxes for sales tax from as far back as 20 years in some cases.
My advice is for you to contact he department of revenue to make sure the collection agency and debt is legitimate as a way of making sure you are not being a victim of a scam. If it is a legitimate company contracted by the State of GA, and GA says you owed the tax, then you should pay it.
However, check with the state first. The state admits to errors in the reporting of bad tax debt.
The problem with the statute of limitations is that it does not run if it is an act of ommission or suspected fraud.
IN your case, it sounds like it may be in error.
You should contact the state department of revenue to find out the source and find out if you can still appeal it.
I doubt if a judgement is involved, else you would have been informed.