Standard tuning.
You can try an a sus 2 instead of the a if you like.
These are the chords for the whole song if you dont have a capo.
WE PLAY GUITARS IN AUSTRALIA TOO !!
[ Tab from: https://www.guitartabs.cc/tabs/l/lady_antebellum/need_y_crd.html ]
A C#M
Picture perfect memories scattered all around the floor
A C#M
Reaching for the phone 'cause I can't fight it anymore
A C#M
And I wonder if I ever cross your mind
A A
For me it happens all the time
E G#M
It's a quarter after one, I'm all alone and I need you now
E G#M
Said I wouldn't come, but I lost all control and I need you now
A A A C#M
And I don't know how I can do without, I just need you now