Why can I not see certain tabs/options in the finance portal?

The finance user authorisation is found until 'Tools' on the finance page and dictates which aspect different user levels will be able to access/see/write within the finance portal:

For more information, please see: User Authorisation in Finance. Note that your user level is determined within the front-end, under 'EntireHR Users':

If important screens are not showing up for you, then please speak to your system admin to get either of the above changed - switch to a different user level with access or modify the existing access for your current user level.