Automatic calculation of accumulative CIS suffered figure, when creating EPS Merged

We run a weekly payroll, and FPS, but each month we also need to submit an EPS to HMRC as we have CIS suffered amounts.

We enter the CIS suffered amount on the HMRC tab (on the relevant month line)

We then go to create the EPS for the specific month, and click onto "load values for this month" - our expectation at this stage is that the figure it pulls through, would be the accumulative figure ie previous month plus the figure entered onto the HMRC tab for the current month.

Unfortunately it is not, I have been advised by the support team that the accumulative figure on the EPS, has to be entered MANUALLY, as the system does not load this automatically.

It would be of great benefit, if we were able to add the CIS suffered for a specific month onto the HMRC tab (for that month) and then create our EPS, which when loading values for that month, ideally it should show the accumulative total.