If you created a fundraiser, then you must set up payouts to your bank account to receive the funds you've raised. If you don't link your account within 90, then all donations will be refunded.
Only bank accounts in eligible countries or regions can be used to receive payouts from fundraisers.
By the way you'll need the account and routing numbers for your bank account. To set up payouts for a fundraiser, you have to create the fundraiser first. Learn how to create a fundraiser.
Good luck!