Hi,
Zoho Books banktransactions API returns entire set of the data irrespective of the query parameters passed.
Query parameters date_start, date, amount_start, last_modified_time are not applied.
Sample requests:
All of the above requests returns the same result as with querying banktransactions with no query parameters.
Let us know if there is anything wrong in the way request is sent, not that the same works in other Zoho Books APIs.