If a talis bag containing tefillin is left on a chair in a beis medresh on Shabat, can the bag be moved in order to use that chair? Thx
Yes. Tefillin are ideally treated as muktzah, but only the status of kli shemelachto laissur, which is permissible to be used for need of the place it is in. If there is a tallis in the bag as well, this is an additional reason to be lenient.
Shulchan Aruch 308:4, see MIshna Brura ibid.