It depends which tags you need.
if you want Caldari Navy Tags, then you need missions with Caldari Navy ships in them to shoot them. So you need missions that have Caldari Navy ships in them.
If you want Amarr Navy Tags, then you need missions with Amarr navy ships in them to shoot them etc etc.
Missions against CN, or Amarr, or whatever, can get offered from any corp who has them at negative standings e.g. Gallente/Minmatar corps offer missions against CN and Amarr, and vice versa.
if you are asking for a list of which exact missions have which exact tags in them, that simply isn’t available; anyone who would have gone to the effort of compiling a list of which tags come from where would have done so for their own benefit and wouldn’t be sharing that for, I think, fairly obvious reasons (in case it isn’t obvious, then everyone would farm those missions and the monetary value of the applicable LP offers would be complete trash). That said, a number (but not all) of the faction L4 missions have an approximate number of tags listed on Eve-Survival.
[edit] it isn’t rocket science. Say you need CN tags. Then when you get offered a mission against CN rats you look it up on eve-survival to see if it says what tags it has. if it says, then great, then you know. If it doesn’t say, then you’re gonna need to do the mission and loot the wrecks to find out.