Hi there,
Sorry for missing this. This forum has been unmonitored for a while, but we’re going to fix that now!
I hope you managed to find an answer to your question. I’ll answer it anyway for other readers who have the same query.
If you’re using our Woocommerce plugin, then you won’t need to set up an explicit callback URL for payments, since the plugin will set and use the correct redirect URL.
Outside of this plugin, if you’re building your own custom Razorpay integration, you may need generate and send a callback URL in the options passed to checkout. Details for this are available here: Link.