If you have the NeuCard, you will get 5% back as NeuCoins. Otherwise, you can purchase Croma gift cards for 5% off using SBI cashback card on Amazon. You can apply 5 gift cards per order.
Croma also generally offers additional NeuCoins for purchases made through the Tata Neu app.
Croma coupons for upto 500 off available on the web used to work fine in the past but now it doesn't for most categories.