Adjusting Pricing

[Roz8]

I've realised that some guests are happy to sleep on my really comfortable sofa. Therefore, I have updated my listing to 3 guests instead of 2, but the pricing area will not allow me to add a fee for additional guests. Is this a problem with the software? This platform appears a little clunky or am I missing something? Thank you.

[Sora0]

Edit listing > extra charges > Fee per person per night.