I was pretty sure back when we installed the system we limited a bunch of things, but now I cannot find the configuration anywhere. In the typical /opt/splunk/etc/system/local on my Splunk Server I do not seem to have the inputs.conf file anymore? Is there where I would limit my ingesting or do I do it on the Splunk Forwarder level?
I am getting a lot of 4634 which is filling up my license quota. I want to not log the Logon Type 3's. Can I just create the file where it should be and start adding things there or how should I go about it?
at first $SPLUNK_HOME/etc/system/local isn't the typical location of inputs.conf, there's an inputs.conf but it's usual only for TCP:9997 data from other forwarders, don't use it for your inputs.
The best approach is to have inputs in dedicated App (not the ones already present in $SPLUNK_HOME/etc/apps).
In your case, you should explore the Splunk_TA_Windows App (https://splunkbase.splunk.com/app/742) that already gives you all the inputs to use.
In this case you have to install it and enable the inputs you need by GUi if you're in a Splunk instance or via conf file if you're in a Universal Forwarder, following the instructions at https://docs.splunk.com/Documentation/Splunk/9.0.2/Data/HowtogetWindowsdataintoSplunk
To reduce the License consuption, you can Whitelist the EventCodes you want or Blacklist the ones you want discard (https://docs.splunk.com/Documentation/Splunk/9.0.2/Admin/Inputsconf#Event_Log_filtering), obviously in this case you limit your monitorig opportunities.