Should you take your tampon out when you go to the toilet?

No, there's no need to remove a tampon to use the toilet.

As tampons go into your vagina, and you either urinate from your urethra or deficate from your anus, there's no need to remove a tampon when you use the bathroom. Just make sure to move the tampon string out of the way or it may get dirty or wet, which may lead to infections, odour, and discomfort.

As a note tampons need to be changed every 4-6 hours, changing every time you use the bathroom would be changing too often - thus tampons would still be dry and friction of this against vaginal tissues will increase tissue damage so pose higher risk of TSS.