Hi debbieg
The Wages amount listed on the Payroll Activity Summary report would be the total amount paid to the employee through wage categories. This doesn't look at the actual Payroll Reporting Categories. So if you have used a payroll reporting category that is a wage category, like ETP - Taxable Component, this will be reported in the Wages amount in the Payroll Activity but would be reported as that Reporting Category in the Payroll Reporting reports.
So if you wanted to reconcile back to an AccountRight report, like the Payroll Activity Summary report, it would be a matter of analysing the Reporting Categories back to the AccountRight payroll categories to determine which ones are Wages, Deductions, Taxes... You would then total those Reporting Categories up to determine the overall wage amount to compare to the Wages in the Payroll report in AccountRight.
This Forum post: AccountRight reports don't match my STP reports outlines the situation as well.