How to refer field filter to an existing question

hi all,
can any1 please help me with how to refer a field filter to an existing question in metabase. like say i have retrieved data from multiple tables. now i can use this retrieved table as a virtual table
“WITH (virtual table name) AS {{#question NO.}}”
by using its question no. from the url.

but when i try to apply field filter to this it is again asking me to refer the filter to any of the pre existing tables in the db, but not this 1.

sorry for non technical language…as i am new to metabase.

Hi @prashantpnd07
Please post the exact queries. It’s difficult to understand what your problem is.