Hi @march1972
There isn’t a way to specify a delivery address at the moment. However, there are a few workarounds which you could use. Take a look at this post and this post for some information on that.
We do have an open feature request for this too that you may wish to comment on to add your vote:
http://community.quickfile.co.uk/t/delivery-address-site-address-on-sales-invoices/9403/