Service Report

Hi,

I am a horticultural robotics engineer and i want to get rid of all the paper for service reports etc…
I want to make a service report what has to be signed by my customer on a tablet

I have created 3 databases:
1 with customer data
1 with (spare)parts
1 with questionaires

How to combine these to 1 sheet, what can be filled in, signed (e-pen on tablet) and send (preferred in PDF format) via email… if possible to 3 receipents at once: billing, the customer and to the cloud account