Will I be charged at the end of my subscription for another year of service? If so, could I be removed from this service?
please use this link: https://firstname.lastname@example.org which will display all payments for Todoist on your PayPal account. If the payment(s) listed there are linking to a payment subscription then you can cancel it directly through PayPal before you get charged, if not, then it's been a one-time payment and you won't be charged again.
I didn't set up a paypal account when I paid for my subscription; will my credit card be charged when my subscription is about to expire?
All our payments (even credit card payments) are processed by PayPal. When you were paying, you were asked to provide your email address in the form, to this address you should have received a payment confirmation/receipt. Please check if there's any mention of a recurring payment subscription on this receipt.
It's possible that the payment has been processed as a one-time payment and therefore you will not be changed again (if that's the case).