The IRS says 9 out of 10 filers who efile and choose direct deposit will get their refunds within 21 days. Some returns are processed fairly quickly, while others take longer for additional processing due to specific items in the return. Some are pulled at random for more thorough investigation.
Wait 24 hours after your acceptance, then you can start using this IRS tool to monitor your refund status.
https://www.irs.gov/Refunds
NOTE: When using that tool, use only the Federal refund amount, and not any total refund amount that includes a state refund.
The amount to use is on your Federal Form 1040, Line 21a.
NOTE: By law the IRS will not issue a refund on tax returns claiming the Earned Income Tax Credit or Additional Child Tax Credit until February 15. So filers with those credits likely won't get their refunds until late February.
To track a state refund:
https://ttlc.intuit.com/community/refund-status/help/how-do-i-track-my-state-refund/00/25571