My federal taxes has been accepted but not deposited its been 19 days, i`ve done the IRS tracker but nothing has changed, it just says accepteddoes it relay take 21 days?

Sometimes it takes even longer depending on what all the IRS is looking at, and some returns are pulled at random for more investigation.

Are you checking with the IRS WMR tool here?
http://www.irs.gov/Refunds 

Wait until 21 days have passed.  If your Federal return is still  showing "processing" longer than 21 days, you can phone the IRS to see if you can learn anything about the delay.

IRS:  800-829-1040  hours 7 AM - 7 PM local time Mon-Fri

Listen to each menu before making the selection.
 
First choose your language. Press 1 for English.

• Then do not choose the first choice re: "Refund", or it will send you to an automated phone line.
• Instead, press 2 for "personal income tax".
• Then press 1 for "form, tax history, or payment".  
• Then press 3 "for all other questions."
• Then press 2 "for all other questions."  It should then transfer you to an agent, but there is likely to be a long wait.

I usually use a speakerphone so I can work on something else while waiting.