How do I know if the CSU received my ACT test?

If I send my ACT score to Cal Poly Slo, will SJSU get it too?

From Cal state apply website:
If you list a CSU campus as an ACT score report recipient, your scores will automatically be sent to all campuses to which you submit an application.

So yes they will be sent to SJSU.

@Gumbymom so because I sent my act scores to cal poly slo, I don’t have to take any further action to confirm that my act scores were received by sjsu?

Correct ^^^^. Once you get your SJSU and SLO login information, check each for the receipt of the ACT scores.