Got a flow to work for one specific Salesorder but need help getting it to work for the rest

Ive built out a flow thats supposed to be bringing over sales orders from netsuite to Orders in salesforce from a saved search Ive created. I got an order to come through when I specifically referenced its internal ID. How can I make it so the flow references the Account the sales order belongs to and automatically bring that account to fill in the fields such as “Company name” (which is just account renamed to that) and also the shipping and billing address fields?

Also, I was unable to make changes to the amount Invoiced fields in salesforce even though I’m an admin on there, anyone know why that is and what I can do to fix that?

Thanks

Not sure there is enough information here to help. You would use mapping, handlebar expressions, lookups, additional criteria filters, etc., to dynamically reference record data to find the record or records you want to update/create. It would be helpful to share screenshots of your flow setup and where, specifically, you have a question.