Unless dbf is a variable use:

COPY FILE tax2006.dbf TO ("tax"+thisform.combo1.value+".dbf")

>any idea,help
>i try to copy my table as..
>

>COPY FILE tax2006.dbf TO "tax"+thisform.combo1.value+dbf && not work
>COPY FILE tax2006.dbf TO ("tax"+thisform.combo1.value)+dbf
>COPY FILE tax2006.dbf TO ("tax"+thisform.combo1.value)+.+dbf
>

>thanks