I filed my taxes 3 weeks ago n they’ve been accepted but I haven’t received my refund

[DawnC]

See the last bullet point; if you have those credits on your return, these refunds are expected to show up next week.    Some common issues which may extend processing times:

• Refunds from amended returns are generally issued within 16 weeks. Please note that due to COVID-19 processing delays, it’s taking us more than 20 weeks to process amended returns. 
• If you filed an injured spouse claim, refer to Topic No. 203 for more information.
• For refund claims with an application for an individual taxpayer identification number (ITIN) attached, refer to Topic No. 857 for more information.
• If you requested a refund of tax withheld on a Form 1042-S by filing a Form 1040-NR, allow up to 6 months from the original due date of the 1040-NR return or the date you filed the 1040-NR, whichever is later, to receive any refund due.
• The IRS expects the earliest Earned Income Tax Credit and Additional Child Tax Credit related refunds to be available in taxpayer bank accounts or on debit cards by  March 1 if they chose direct deposit and there are no other issues with their tax return. However, some taxpayers may see their refunds a few days earlier. Check Where's My Refund? for their personalized refund date.

[Mike9241]

also the IRS has updated it's refund message saying it could take 4 weeks for 2021 refunds,'