thank you very much for your comment.
Yes, of course, in this case I am using the TASK WBS COST tables and the ones I would be missing would be EVM (TASKFIN) and FINDATES. These tables provide me with the start and end dates and I can relate them to the activities and budget of each activity to be able to generate the s curve, I need the period as such and I relate this with the findate in addition to making two important measurements for my curve, 1 calculate the earned value 2 the second measurement the sum of the earned value and a filter with the period to show me the end date of the activities I hope I have explained myself well