You'll typically receive your Federal refund within 21 days of e-filing your return.

Mailed returns typically take 4 weeks longer to be processed.  It takes that amount of time for your return to show up in their system, sometimes a bit longer if they are backed up. 

You can track both your Federal and State refunds here.:

There are quite a number items that determine  how much you receive in tax refunds. Some major ones include: 

• How much you had withheld from your paychecks;
• Your age; 
• Whether you itemize or take the standard deduction;
• If you're married or single;
• If you have any children or other dependents. 

For more info, check out this article about understanding your tax refund.