I just checked your account and the changes for your role and permission has not yet pushed through. It should be fixed when the next system refresh is made. The "accounts" link should be available once your status has been updated. Once y are updated, you can add the "accounts" link on your tab by clicking on the "+" on the tabs near the top of the webpage. You will then be transferred to another page, there is a link there that would let you "customize" your tabs. Click on it and you will se the available links on the left selection column. Click on "accounts" and then click on the "add" button. This should put the "accounts" link on your tabs.
I will however inform you that we are still in the prces sof building the new "accounts" layout for thailand. Please refrain from putting new information or accoints until I am able to finish the layout development.