QB Issue Resolution:

May I know if the books were closed and taxes had been properly filed? As always, I recommend consulting with an accountant for further clarification. With the approval of your accountant, obtain copies of all bank statements for reference. I have these links on how to start doing your reconciliation and troubleshooting reconciliation.

Resolution for Issue 'I have about 3 years of transactions in my credit card account. How can I reconcile that account?' available: Yes (Solved).
Source: Intuit Community forum.

I have about 3 years of transactions in my credit card account. How can I reconcile that account?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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