Apple Subscriptions

I worded that wrong - I have "Microsoft Office 365 For Mac" on my mac - but its paid for through my Apple account.

However I don't find a spot where I can find that subscription listed with the amount due and the due date - it just automatically comes out of my bank account. Id like to be ready for payment when that happens - to avoid being overdrawn. It doesn't seem to charge me on the same date. Its only $6.99 but I'm a poor person with a lot of bills and Im living from paycheck to paycheck