How to charge/opt-in for bed sheets directly via booking.com?

Hi! Is it possible to set up a voluntary extra payment for bed sheets via booking.com, so that the guest can opt in and pay the extra fee if they'd like to have bed sheets and towels? I googled this and found a guidance to go to VAT/Tax/Charges or edit my Policies, if the option is not available there- but still can't find the option to edit this. Anyone here who has managed to do this and could tell how?


Either dont do it at all as it's crazy,  disgusting unethical idea


Or do it on arrival