Tax credits reduce the amount of taxable income that you owe to federal and state governments. These credits, instituted by legislation are generally meant to encourage or reward activities that are considered to benefit the economy or otherwise further the purposes that governments consider important. In most situations, tax credits cover expenses within a defined time frame and have requirements that you must meets before you can claim them.
Consult your tax advisor to see how tax credits may be of benefit to you. Tax credits vary with income and other deductions and credits.