If you're a tournament director, just make sure you've set a corresponding NSDA Event type in each event's settings. Then, we'll post the points automatically each week.
If you're a coach, go to your Competitors tab, and use the links on the right to link your school in Tabroom to the corresponding school in the NSDA Points App (you'll need your NSDA Points App login/password). Then, either import new students from your NSDA roster, or link up existing students so Tabroom knows who to assign points to. For more information, see the section of the online manual on School Administration.
Note that NSDA autopointing isn't retroactive. That is, it will only work for tournaments you attend AFTER you link your accounts. If you attended a tournament prior to setting up the links, you'll need to enter those points in the NSDA Points App manually.
Also, note that autopointing is only run once a week, usually on Tuesday or Wednesday. If you hold a tournament over the week, it will therefore take a few days for the points to show up for confirmation in the NSDA Points App.