What do you mean by sun scroll task ?

Oh ok now i see what you means,

As previous poster said those are mainly PVP events .

A tip though :

Certains of those events ; rescue jinchuriki or sage world battlefield for instance send the reward as a mail .

Don't claim those reward unless you can achieve the 5000 mark for the week (reset on mondays )

You can stack those mails for longer than it said (in fact it seems you can hold onto those as long as you want )

Once you got enough you can open them all and reach the 5k mark .

Very USEFUL if like me you are not playing religiously al the events . It allowed me to reach the sun scroll requirement for Main breakthrough multiple times .