There are currently 6 different types of quests in Requia Online. Only 1 quest of each type can be accepted at a time.
By tapping an active quest icon, you will be guided to the corresponding quest giver.
If you want to do another quest of the same type, you can easily cancel any quest by holding down the quest icon for 5 seconds. However, the current progress will be lost.
Daily Quests are reset daily at 24:00 GMT (01:00 CET or 02:00 CEST).