Our google review link changed and the old one on receipts no longer works

and if you're reprinting anyway, put a QR code next to the short link. point it at your own /review address too, not straight at google, for the same reason. people scan far more than they type.

Grab the current one from your Business Profile (the ask for reviews / get more reviews option gives you a shareable link). For the receipts already printed there isn't much you can do if the dead link was a Google one. For next time though, never print Google's link directly. Print a short address on your own domain (something like /review) and redirect it to whatever Google's current link is. When Google changes it again you edit one redirect instead of reprinting.