A T4A slip is a statement of pension, retirement, annuity, and other Income. Generally, you need to complete a T4A slip if you are a payer of other amounts related to employment; usually sub contract, that are not reported through the payroll module. Spire can generate these reports with vendor invoice totals less HST/GST in Box 48 (fee for services) of the T4A, when you have a Spire Payroll license.