You will need to export table.qza to biom format, then convert to tsv if you really need this in tsv format.
If you are trying to export this table for use outside of QIIME 2 (e.g., with phyloseq), see this tutorial.
But it sounds like maybe that's not what you really want.
Ah, yes, that makes lots of sense. You will want to use filter-table — see this tutorial.
I hope that helps!