Roughly speaking, the credit amount is the difference between the AMT computed with and without the deferral item of preference. If you were unfortunate enough to have been affected by the alternative minimum tax (AMT) in a prior year, then you may have a carryover of an unused minimum tax credit.
Freebase(1.00 / 1 vote)Rate this definition: Vulgarity is the quality of being common, coarse, or unrefined. This judgement may refer to language, visual art, social classes, or social climbers.
It seems there are two major senses (meanings) for the word vulgarism. Certainly the one described in the bulk of the article article is one of them (corresponding roughly to AHD 2b, M-W 2a, and OED 2), but the others appear to be equally valid.