Link cell from a dynamically generated sheet to a master sheet

Hello everyone, this is my first time posting here, i hope this is in the right place.

My problem is as follows:

I need to generate worksheets for various tasks that are separable quoted items on a larger project. i then need to have the total of each of the newly generated task sheets link back to the master sheet, where the subtotals are added together and a project total is calculated. I have come across some code that allows me to generate the sheets with the names of the particular tasks on to the mastersheet, but i cant get the total of each task sheet to link back to the mastersheet automatically. The task sheets are generated from a template which in turn is linked to a rates sheet.
Any help would be greatly appreciated.