"Ship from address" issues

Hi there,

I’m currently in the process of trying to sell my first item through Amazon fba. The issue I keep having is that I don’t know what the ‘ship from address’ is on the send/replenish inventory page because I’m sending it directly from where I bought it to the chosen fulfilment centre. I’ve tried to find an address for this company but they have multiple facilities over the UK. Is this ‘ship from address’ vital? If so how do I get around this?