CSU application question

I want to apply to the schools I like, but I don’t want to show them my last SAT score because I’m positive I improved in both categories after taking the SAT yesterday. Can I still apply right now, and send my scores later? Or do I have to wait until I receive my scores to send the application?

You can submit your application now, indicate when you took the last SAT and then send the scores later. CSU’s will superscore, so it is to your benefit to send all scores. They will not hold low scores against you but will select the highest scores from each section.

Do I have to though? It will cost money to send my other score I’m positive I did better on the test I took yesterday

my other score and I’m positive*

No, you do not have to send all scores but SAT usually sends all scores unless you use score choice. Again, it will not hurt your chances since the CSU’s will use the highest scores from each section.