in access every join should be closed within brackets before using next put one more bracket as below
SELECT indents.pr_no, indents.issue_date, indentitems.quantity, indentitems.date_required, departments.department_code, departments.system_name, departments.subsystem_name, items.description, items.group, items.units
FROM ((indentitems INNER JOIN [indents] ON indentitems.pr_no=indents.pr_no)
INNER JOIN departments ON indentitems.department_code=departments.department_code)
INNER JOIN items on indentitems.item_code=items.item_code;
-Pankaj