Want to modify payment form

[gladsadoo]

I integrated payment gateway of paypal with the website NGO Url: https://rahemanzil.com. the problem is this when anyone clicks on donate now, he/she fills information on my website and he/she been directed to PayPal and even I select guest checkout despite its asking for more details like P.O box num, and also option to create an account on PayPal, that I don't want. So how can I remove or add fields in final checkout page of PayPal? I send screenshot I want to remove that things when anyone goes to pay me