List of computed columns by table for a database.

computed_fields.sql

select
s.name SchemaName
,object_name(cc.object_id) as TableName
,c.is_computed
,cc.name
,cc.column_id
,cc.definition

from sys.computed_columns cc inner join sys.columns c
on cc.object_id = c.object_id and cc.column_id = c.column_id
inner join sys.tables t on t.object_id = c.object_id 
inner join sys.schemas s on s.schema_id = t.schema_id

order by SchemaName, TableName, c.column_id