I've been reading for 1 hr about crossbeak but still need your help!

If it's minor, keep it that way by filing the side if it overlaps enough to keep it from closing properly. Make the side fit inside the top. This will encourage the natural alignment to maintain itself. If you don't then there's nothing to keep it in check.

You can try a homeopathic called calcarea phosphorica, and there are other homeopathics folks have recommended. Take a look into those.

 

Try to keep it filed down the best you can to try to keep the proper alignment however, once it starts, it rarely corrects itself. I have one serious cross beak bird outside who did not have it from birth, just as the beak grows if there is a slight misaligment with the jaw at all, it will start showing up. My serious crossbeak hen has no issues....she can still eat with the b est of them and hers is BAD.