need to add name of buyer at check out

[Neo121]

how do i add a button or field for the buyer to put his name and contact informaiton

[PayPal_JonK]

Hello @Neo121, 

Welcome to the PayPal Community! There should already be a field during the buyer's checkout to collect the needed information to process the transaction and shipment if needed. You can read more about setting up a button here:
 

How can I edit a PayPal payment button?

How do I add a PayPal payment button to my website?
 

I hope those help!

 - Jon K