Have you connected the Tsheets app to your qbo acct.?

Resolution for 'approved time issue: 'Why wont quickbooks accept and save my approved time sheets from Tsheets?' available: Yes.

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

For more information about resolving issues related to approved time in Quickbooks/QBO or to get support for the issue 'Why wont quickbooks accept and save my approved time sheets from Tsheets?', click the link below: