We appreciate your question about adding credit or making advance payments for your monthly subscription, k3rs.
Currently, QuickBooks doesn't offer prepayments for upcoming monthly subscription charges or add credit to your account without transitioning to an annual plan. The system is designed to automatically process payments from your saved payment method on your billing date each month.
To ensure uninterrupted service, we recommend keeping your payment method up to date and ensuring it has sufficient funds available.
If you have any further questions or require additional assistance, please add a comment below. We are here to help.