Hello @Anand Deshpande

If you want to configure UPI in Odoo-18, firstly you need to configure Payment Provider like Razorpay or Stripe.

Inside the Payment Provider (Eg: Razorpay), add you credentials.

Than in available payment methods, you need to enable UPI as payment method.

I have attached the video for rederence.

Link : https://nimb.ws/bYnUIP2

Hope this Helps,

If you need any help in customization feel free to contact us.

Thanks & Regards,

Email:  odoo@aktivsoftware.com           

Skype: kalpeshmaheshwari