Here is the article on all of the steps to use sales tax in qbo:  https://community.intuit.com/articles/1146054-sales-tax-in-quickbooks-online

Resolution for 'bank savings issue: 'I transfer collected sales tax to a bank savings account. I created an account in QB called Sales Tax Payable. How to reconcile all accounts and balance sheets?' available: Yes.

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

For more information about resolving issues related to bank savings in Quickbooks/QBO or to get support for the issue 'I transfer collected sales tax to a bank savings account. I created an account in QB called Sales Tax Payable. How to reconcile all accounts and balance sheets?', click the link below: