Select your name, select the gig and tick the box to say whether you're attending or not.
If you tick the wrong box and send another form, note that you can be both going and not going. The form won't stop you doing this. If your situation changes, or you've made a mistake, email or message me.
You will get an email confirming your selection - check your spam folder if you don't see it shortly after submitting.
Once the form has been submitted, refresh the page to see the form again.