To query on today's date in MS Query, follow these steps:

1. Open MS Query and select the data source you want to query from.
2. In the Query Wizard, select the table or tables you want to query and add them to the query.
3. In the Criteria box for the date field you want to filter on, enter the following syntax:
   =DATEVALUE(TODAY())
   This will filter the data to show only records where the date field is equal to or greater than today's date.
4. Click Next and follow the remaining steps in the Query Wizard to finish creating your query.

Note that the syntax for querying on today's date may vary depending on the data source you are using. If you continue to receive error messages, you may need to consult the documentation for your specific data source or seek assistance from a technical support professional.