which of the following combination of qualities ensures a good tax system?

The combination of qualities that ensures a good tax system is economy, convenience, certainty, and equity. Economy means that the tax system should not be overly burdensome or expensive to administer, both for the government and for taxpayers. Convenience means that the tax system should be easy for taxpayers to comply with and for the government to administer. Certainty means that taxpayers should be able to know how much tax they owe and when it is due. Finally, equity means that the tax system should be fair and just, with the burden of taxation shared fairly among taxpayers based on their ability to pay. Therefore, a good tax system should balance these four qualities to ensure that it is effective, efficient, and fair.