I started STP pay runs recently. Can I enter back dated pay runs?

Hi PonyExpre55, 

Thank you for reaching out on this and Welcome to our Community!

You can process backpays by changing the pay period end date and the pay period would automatically adjust based on your pay period. You can process and finalise the payrun as per normal, but after the payrun is finalised, don't forget to create and lodge an update event. Here is how:

Create and lodge an update pay event

Thank you and please let us know if you require any additional assistance.