QB Issue Resolution:

Bank of America requires you to do something on their web site I believe.  Go there in Safari, log in, and scan the messages to see what they recommend.

Resolution for Issue 'Online Banking Setup Giving Connection Error (General Error)' available: Yes (Solved).
Source: Intuit Community forum.

Online Banking Setup Giving Connection Error (General Error): 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.

Support for General error
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Error Recovery for General error [Canada]
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