I few problems...
1. You have some trailing spaces in column A of Sheet1. Remove them.
2. Your lookup range starts at row 4, but should include row 3 too.
3. If you want to lookup multiple columns to return row number and you want to use MATCH, you need to do one at a time.
e.g. =IFERROR(MATCH(A2,Sheet2!$I$2:$I$20,0),MATCH(A2,Sheet2!$J$2:$J$20,0))
copied down.
Bookmarks