The easiest way to set/unset "options" using checkbox is by using a single eval statement to set/unset the token - note searchWhenChanged=true. <input type="checkbox" token="reqIdFilter" searchWhenChanged="true"> <label></label> <choice value="enable_id_filter">Enable</choice> <change> <eval token="showReqIdFilter">if(match($reqIdFilter$, "enable_id_filter"), "true", null())</eval> <set token="form.RequestId"></set> </change> </input> <input type="text" token="RequestId" depends="$showReqIdFilter$"> <label>RequestId</label> </input> This also clears the RequestId token if you toggle the Enable checkbox. In your search just leave the $RequestId$ in there. It will be cleared when you click the box so will just be an empty string ... View more