Assuming that you are registered for GST then yes you do need to add tax codes for everything.  But usually you can set tax codes per vendor – so there may not be as much checking as you fear.  You may have multiples similar codes if you have activated taxes […]

Resolution for 'activated taxes issue: 'What tax to add in bank transactions' available: Yes.

The activated taxes 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 activated taxes issue yourself by looking for a resolution described in the article. If it is a complex activated taxes issue or you are unable to solve the issue, you may contact us by clicking here or by using other activated taxes support options.

For more information about resolving issues related to activated taxes in Quickbooks/QBO or to get support for the issue 'What tax to add in bank transactions', click the link below: