Many thanks, but unfortunately you are talking to a dumbo! I can handle Excel but have no idea what an Open command is, where and how do I insert the code you sent me etc..

What I am doing right now is opening Workbook called invoices 2015, renaming next new sheet as 101 (for example), and then manually typing 101 into E15.

New invoice.....new worksheet....and so on.

Not at all satisfactory.

Thanks for the help