My refund will be coming up on 21 days on Tuesday the 18th and it has not been approved yet how come?

The IRS generally issues refunds within 21 days, but it can take longer.  Continue to check the IRS Where's My Refund? site for information about your refund status.  If more than 21 days pass, we suggest calling the IRS to inquire about your refund.  Go here for tips on reaching a live IRS agent when you call.

Reference:  When will I get my IRS tax refund?

Has your refund come yet