If you’re getting error 9999 it’s a known scripting error that Intuit is working on. See:
Resolution for 'couple days issue: 'I’ve been having syncing issues for a couple days . . . using Huntington Bank.' available: Yes.
The couple days 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 couple days issue yourself by looking for a resolution described in the article. If it is a complex couple days issue or you are unable to solve the issue, you may contact us by clicking here or by using other couple days support options.
For more information about resolving issues related to couple days in Quickbooks/QBO or to get support for the issue 'I’ve been having syncing issues for a couple days . . . using Huntington Bank.', click the link below: