It says here that you should get the letter in 24 hours after submission 
https://www.canada.ca/en/immigratio.../biometrics/how-to-give-biometrics.html#steps
	
		
			
		
		
	
				
			https://www.canada.ca/en/immigratio.../biometrics/how-to-give-biometrics.html#steps
	