as long as you had the subscription, just enter the journal entry and back date it. you can not make entries dated before you started the subscription
Resolution for 'back date issue: 'How do I post yearend adjusting journal entries in prior yearend.' available: Yes.
The back date 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 back date issue yourself by looking for a resolution described in the article. If it is a complex back date issue or you are unable to solve the issue, you may contact us by clicking here or by using other back date support options.
For more information about resolving issues related to back date in Quickbooks/QBO or to get support for the issue 'How do I post yearend adjusting journal entries in prior yearend.', click the link below: