No no please don't... it will clog up the main sewer line and they only way to unclog it is to call a plumber, this will cost about $140-$200 depending on where you live :( wrap it in tp and put it in the trash
When I was younger I flushed them down the toilet, because on the package it said you could. Several months later toilet clogged. Plumber pulled out all the tampons. When my parents got the bill I can still hear them yelling about it.