Virginia tax collections increased slightly in August. Gov. Terry McAuliffe said that general fund revenues were up 1.7 percent from August of 2013. He says that’s an encouraging sign, but cautions that August is not a significant month for revenue collections. The governor says September collections will complete the first quarter of the fiscal year and provide a better picture of revenue growth. Last month’s increase was driven by the individual income tax and the state sales tax. The sales tax accounts for nearly one-fifth of the general fund. It increased by 4.5 percent.