Adding a new field to a standard form and mapping it to a field in another form

Hello Everyone,

I am new to Dynamics AX ERP tool and currently in development area. I have been assigned a task where i need  to add a new field to the ASSET BOOK form which will just show invoice date of a purchase order. This field must be visible in the under Purchase Account in the purchase/sales tab of the Value Model form in Fixed Asset module.

I have no experience in x++ coding and find this task cumbersome. A little heads-up in this area would help me a lot.

Thanks in advance!