The IRS issues most refunds in 21 days.
Well I didn't get my refund and I would like to know what is wrong with the refund and why
Yes, The IRS have backlog of income tax returns to be processed due to forms needed to be updated and/or processing of stimulus payments. The IRS started processing electronically filed income tax returns on a first in, first out basis in February 12, 2021 The refunds are processed within 21 business days after IRS acceptance of the electronically filed return.
If you haven't received your federal refund, you can check the IRS website under Refunds tab to check the status of your return