I appreciate your proactive approach to managing your QuickBooks tasks efficiently, @Helen83. Let's dive into your questions and clear up any confusion you might have about the reconciliation process. I'm here to help you feel more confident in using these features and ensure you can manage your reconciliations with ease.
Yes, you can pause your reconciliation process if you're unable to finish it in one session. When reconciling your account, you can click the Save for later option in the Reconciliation window to save your progress and resume it anytime.

Regarding your query about the Finish now button, this option allows you to force reconcile your account. This enables you to create an adjustment entry to complete the reconciliation process.
As for your follow-up question, you can still edit your past reconciliations. However, please note that these changes can unbalance your accounts and affect other reconciliations. This also impacts the beginning balance of your next reconciliation.
Keep up the great work in managing your finances, @Helen83, and remember, taking it step by step is the best approach. We're here to assist you whenever you need further guidance or clarification. Wishing you smooth reconciliations and continued success with your financial management!