When upgrading Microsoft Dynamics GP, the security roles and tasks are not automatically updated; this is to avoid overwriting or causing problems with any customizations to these roles and tasks which might have been made. Instead Microsoft provide a set of scripts which you can choose to run to add the missing items.
I always recommend clients not directly amend the standard tasks, but make copies and amend the copy (this provides a way to roll back to the standard versions should there be a need).
The update scripts are available from the Dynamics GP Support and Services Blog and I have updated my links on the GP Missing Security Scripts page to link to that blog and the script directly; if you’re using an additional product such as Project Accounting, Enhanced Intrastat, VAT Daybook or HR & Payroll there are additional scripts on the blog post which you can run.