數(shù)電票，開了正數(shù)后對應(yīng)又開了對應(yīng)的負(fù)數(shù)，需要把正數(shù)與負(fù)數(shù)發(fā)票都打印出來做賬嗎？或者正數(shù)與對應(yīng)的負(fù)數(shù)都不打印做賬？