I can confirm what the kind @Ludovica92 has said!
You can access and open the task in the same way that you open and access a translation task. The only difference is that you are making any corrections or edits to the translation that you think are necessary 
Make sure you mark each segment as complete and run a final QA check before completing the task!
Once you’ve completed the revision, we strongly encourage revisers to leave a score and constructive feedback on the translation! You can do so by following the instructions in this thread 
This feedback is really valuable because it helps translators improve and understand why you have changed parts of their translation!
If you want to read more about the translation quality at TWB and how to leave constructive feedback, then check out this section on the TWB Community!
Thanks for your support to the project, Lucia 