SAT and ACT scores?

I’m planning on only sending my ACT scores in to colleges on the common app except for schools that require both the SAT and ACT. For example, I’m sending my ACT to tufts, but am spending both for Stanford. How do I show this on the common app? Do I have to enter my highest scores for both the SAT and the ACT on the common app, and then only send the official scores of my ACT to tufts? Or do I only self report only my ACT and send all official scores to Stanford even though they aren’t represented on my common app? Or do I have to send everything to everywhere?

Self report the ACT and send all scores where you need to.