QB Issue Resolution:

you have to wait for intuit to upgrade your version

the same options exist in your version just harder to find, customization has not changed. in your version it is

gear>settings>company settings
from delivery>customize

Resolution for Issue 'My QBO version doesn’t seem to have the new Custom Form Styles menu and invoice options. How can I get this new feature?' available: Yes (Solved).
Source: Intuit Community forum.

My QBO version doesn’t seem to have the new Custom Form Styles menu and invoice options. How can I get this new feature?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Invoice
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Error Recovery for Invoice [Canada]
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