first as you want to use 12 tables
rename tables to be the same name but ends with no from 1 to 12
like this table1,table2....
then
all tables must be on the same design and data format
then crate a report using report wizard on one of this table
create a form that contains a combo box of...
you can make a copy report from the original invoice report
then you can print copy only by selecting it and you can make this select option on a dialog form...