I've Purchased a Theme From Themeforest and i installed Magento with The Theme's sample Data
the installation went just fine after that i got athat warning
what can i do ?
In the past, Magento had a lot of issues with rounding prices and taxes. These issues are (mostly) solved nowadays. The solution on how to get rid of this error is already available on StackExchange: http://magento.stackexchange.com/questions/93629/warning-tax-configuration-can-result-in-rounding-er....