Coupon is TESTANDCODE
I had already used it before realising it was one or the other, honestly its one of the better TLD’s IMO, too bad Cloudflare doesn’t support it yet.
Edit: I should have mentioned, you have to make a tentative payment of 1 USD, which is reverted.
Really appreciate the response - thank you.
I just had a handful of domains tick over renewal on Google Domains in the past week, so I suppose I’ll have some time to see what Squarespace is like from an administration perspective before I end up having to commit to renewing with them.