Camera not focusing.

[Canon4000]

My camera all of a sudden will not focus into anything I’m not sure if I hit a certain setting that would change that or if something happened to my lens. I thought I would try this out before calling to send it in! Thank you in advance!

[rs-eos]

Which camera do you have? Assuming it's a 4000D based on your username?  Which lens do you have? The Canon EF-S 18-55mm?   First, check to see if the Autofocus switch is set to manual (AF/MF switch on the lens).