How long do usually wait for taxes after filing and is it business days

[EdwardLO]

The IRS releases most refunds within 21 calendar days of the date that the IRS accepts the return.  (exception: the IRS did not begin processing e-filed returns until 1/29, so if you filed before then, it would be approx. 21 days from that date). See below for information on how to track your refund.

https://ttlc.intuit.com/replies/5340655