How long will my Sales Target Management plugin data be kept after deactivation?

How long will my Sales Target Management plugin data be kept after deactivation?

As long as the date on which you clicked the ‘deactivate’ button is BEFORE the current subscription renewal date, the data pertaining to this plugin will be retained. After that the data pertaining to this plugin is deleted from the application. 
Plugins in Tagrain are either Subscription Based or License Based. So the price that you pay for your plugins is based on the number of POS terminals that you have in your setup and the number of licences that you have acquired.
There will be no change in your subscription amount in the current billing cycle if you are only deactivating the Sales Target Management plugin AND not updating your Store / POS count.