i need to design a sales invoice for a small building company

[ed]

i want to be able to design it myself and also is there a free download i can
get to keep records of invoices and sales

 

[Echo S]

i want to be able to design it myself and also is there a free download i
can
get to keep records of invoices and sales

http://office.microsoft.com/en-us/templates/default.aspx might get you
started. Put appropriate search terms (invoice, for example) in the Search
box....