The latest version (19.6.54) is adding ability to show YTD totals on payslips.
There is new field on payslips and recurring payslips:
If you want to show totals, this box will need to be checked on each payslip. You can use Form Defaults to set the default date so when you create new payslips, the box can be automatically checked with your YTD start date.
The presentation on payslip is quite ugly at the moment.
It will show the figures but not within line items of actual payslip. The reason is that YTD totals are grouped by Payslip Item but on any payslip you can use the same payslip item multiple times and supply different description. So these two layouts are not really compatible. Eventually I’d like YTD totals to be shown differently but there is some layout re-work needed to be done on payslip itself.
So this is not perfect implementation yet but better than nothing.