QB Issue Resolution:
Yes. Typically your bank would be setup as a Vendor because they provide a service (your bank account) that you typically pay for (maintenance fees).
Even though they are listed as a vendor, you can still record income from them such as interest and post it to the correct income account of your choice.
Resolution for Issue 'Should I specify our bank as a vendor for Service Charges and Dividends?' available: Yes (Solved).
Source: Intuit Community forum.
Should I specify our bank as a vendor for Service Charges and Dividends?: 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 bank
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Error Recovery for bank [Canada]
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