!Add Task
--------------
Task Name: <$edit-text tiddler="NewTask" tag="input" default="New Task" class='tc-edit-texteditor' placeholder='New Task'/>
Brief Description: <$edit-text tiddler="BriefDesc" tag="input" default="no-one" class='tc-edit-texteditor' placeholder=''/>
Asigned to: <$edit-text tiddler="AssignedTo" tag="input" default="no-one" class='tc-edit-texteditor' placeholder='no-one'/>
<$button>New Task
<$action-createtiddler $basetitle='{{NewTask}}' $savetitle=tasksavetitle/>
<$action-navigate $to={{!!tasksavetitle}}/>
<$action-setfield $tiddler='_templateTask' $field='title' $value={{NewTask}}/>
<$action-setfield $tiddler='_templateTask' $field='caption' $value={{BriefDesc}}/>
<$action-setfield $tiddler='_templateTask' $field='tmap.id' $value={{{ [[]make[%uuid%]] }}} />
<$action-setfield $tiddler='_templateTask' $field='assignedto' $value={{AssignedTo}} />
<$action-deletefield $tiddler=NewTask text/>
<$action-deletefield $tiddler=AssignedTo text/>
<$action-deletefield $tiddler=BriefDesc text/>
</$button>
<br><$action-createtiddler $basetitle='{{NewTask}}' $savetitle=tasksavetitle/>
<$action-navigate $to={{!!tasksavetitle}}/>Here's one attempt. It looks like there's a bit of duplication but maybe that's how you need it. Other forum users will almost certainly have better solutions but this might work for you.
!Add Task
--------------
Task Name: <$edit-text tiddler="NewTask" field=NewTask tag="input" default="New Task" class='tc-edit-texteditor' placeholder='New Task'/>
Brief Description: <$edit-text tiddler="NewTask" field="BriefDesc" tag="input" default="no-one" class='tc-edit-texteditor' placeholder=''/>
Asigned to: <$edit-text tiddler="NewTask" field="AssignedTo" tag="input" default="no-one" class='tc-edit-texteditor' placeholder='no-one'/>
<$button>New Task
<$action-setfield $tiddler='_templateTask' $field='NewTask' $value={{NewTask!!NewTask}}/>
<$action-setfield $tiddler='_templateTask' $field='caption' $value={{NewTask!!NewTask}}/>
<$action-setfield $tiddler='_templateTask' $field='BriefDesc' $value={{NewTask!!BriefDesc}}/>
<$action-setfield $tiddler='_templateTask' $field='tmap.id' $value={{{ [[]make[%uuid%]] }}} />
<$action-setfield $tiddler='_templateTask' $field='AssignedTo' $value={{NewTask!!AssignedTo}} />
<$action-createtiddler $basetitle={{_templateTask!!NewTask}} $savetitle=tasksavetitle BriefDesc={{_templateTask!!BriefDesc}} AssignedTo={{_templateTask!!AssignedTo}} caption={{_templateTask!!caption}} tmap.id={{_templateTask!!tmap.id}} />
<$action-setfield $tiddler=NewTask NewTask=''/>
<$action-setfield $tiddler=NewTask caption=''/>
<$action-setfield $tiddler=NewTask AssignedTo=''/>
<$action-setfield $tiddler=NewTask BriefDesc=''/>
<$action-setfield $tiddler=_templateTask NewTask=''/>
<$action-setfield $tiddler=_templateTask AssignedTo=''/>
<$action-setfield $tiddler=_templateTask BriefDesc=''/>
<$action-setfield $tiddler=_templateTask caption=''/>
<$action-setfield $tiddler=_templateTask tmap.id=''/>
<$action-navigate $to={{tasksavetitle}}/>
</$button>
<br>
!Add Task
--------------
Task Name: <$edit-text tiddler="$:/_opTaskStore" field="taskname" tag="input" default="" class='tc-edit-texteditor' placeholder='Type a new task name here'/>
Brief Description: <$edit-text tiddler="$:/_opTaskStore" field="description" tag="input" default="" class='tc-edit-texteditor' placeholder='Brief descirption and Board title'/>
Map name: <$edit-text tiddler="$:/_opTaskStore" field="caption" tag="input" default={{$:/_opTaskStore!!taskname}} class='tc-edit-texteditor' placeholder='Task name as will appear on map'/>
Asigned to: <$edit-text tiddler="$:/_opTaskStore" field="assignedto" tag="input" default="" class='tc-edit-texteditor' placeholder='no-one'/>
<$button>New Task
<$action-createtiddler $basetitle={{$:/_opTaskStore!!taskname}} shorttext={{$:/_opTaskStore!!description}} tmap.id={{{ [[]make[%uuid%]] }}} assignedto={{$:/_opTaskStore!!assignedto}} caption={{$:/_opTaskStore!!caption}} />
<$action-deletetiddler $tiddler="$:/_opTaskStore"/>
</$button>Correct me if I'm wrong but I believe your optaskstore is a nice example of a state tiddler.
https://tiddlywiki.com/#StateMechanism
Good luck with the project.
<$action-createtiddler $basetitle={{$:/_opTaskStore!!taskname}} $savetitle="$:/_opTaskStore!!finalname" shorttext={{$:/_opTaskStore!!description}} tmap.id={{{ [[]make[%uuid%]] }}} assignedto={{$:/_opTaskStore!!assignedto}} caption={{$:/_opTaskStore!!caption}} tags="[[Task]]" color={{$:/_opTaskStore!!color}}/>
<$action-navigate $to={{$:/_opTaskStore!!finalname}}/>$savetitle="$:/_opTaskStore!!finalname"