Basic record update on other form

Basic record update on other form

Hello there,

i have a simple question but can't find the answer on forums or examples online.

I have 3 forms

On the 1st one I have the details of all the clients (Vendors and sellers). It has also a dropdown field (Buyer or Sellers)

On the 2nd I have the products they want to buy (If buyers) with the prices

On the 3th I have a form with products and price they're selling products (If sellers)

I'd like that when I add a new client, if he's a seller to open the form "Seller" and update the lookup field with the name of that client, and the same for the buyers (Open the form and update the lookup field)

No problem to be redirected to the right form, but I can't update the lookup field and every time I have to choose the name from the dropdown...


Thanks in advance