How long before getting approved

[DelilahLO]

You can start checking the status of your refund within 24 hours after you have e-filed your return.  You will be provide with an estimated refund date as soon as the IRS processes your tax return and approves your refund. Most refunds will be issued in less than 21 days.

Here is more information to help you understand further:

https://www.irs.gov/refunds