This may come as a surprise to many individuals, but not everyone needs to file a federal tax return. According to the IRS, many individuals who do not need to file tax returns still do, because they are not aware of the requirements. To determine whether you need to file a federal tax return, you must first look at your gross income. In general, you need not file a federal tax return if your tax filing status and age and you gross income is up to the amounts listed below. However, even if your gross income is not more than the amounts indicated in the below chart, you may still need to file a return under certain circumstances.
Itzcoatlâs successor Montezuma (Moctezuma) I, who took power in 1440, was a great warrior who was remembered as the father of the Aztec empire. By the early 16th century, the Aztecs had come to rule over up to 500 small states, and some 5 to 6 million people, either by conquest or commerce. TenochtitlÃ¡n at its height had more than 140,000 inhabitants, and was the most densely populated city ever to exist in Mesoamerica.
The Aztec calendar is the calendar system that was used by the Aztecs as well as other Pre-Columbian peoples of central Mexico. It is one of the Mesoamerican calendars, sharing the basic structure of calendars from throughout ancient Mesoamerica.The calendar consisted of a 365-day calendar cycle called xiuhpohualli (year count) and a 260-day ritual cycle called tonalpohualli (day count).These two cycles together formed a 52-year century, sometimes called the  calendar round .iuhpohualli is the Aztec year (xihuitl) count (pohualli). One year consists of 360 named days and 5 nameless (nemontemi). These 'extra' days are thought to be unlucky. The year was broken into 18 periods of twenty days each, sometimes compared to the Julian month.