I have had this problem a few times now:

“Hi..I think I have asked this before. I have finalised the payroll for Sep, but an employee has made me aware of a change required. So, after making the change to her payslip for Sep only, I want to send her revised payslip electronically-every time I do that it sends all the payslips. Can I send just 1 electronically?”

BrendanHi Sue. Unfortunately, all of the payslips are sent together, there isn't a way to get around this currently.