Hi,
I have read and understand the requirements you have posted and I'm very interested in providing a solution to you.
I have done Access DB programming in past. But that was not exactly payroll.
I'm a professional developer having expertise in PHP, MySQL, MsAccess, MsSQL,.NET, MsSQL, jQuery, Wordpress, HTML etc. and successfully executed thousand of job as a leader or developer in my 15+ years of career.
Please have a look at my freelancer portfolio.
If you like what you see and if my proposal and quote fits within your budget then please PMB me your response and I will take it on from there.
Regards
-Sam