@user17576369146 You tax prep assistant will let you know exactly what is needed, but for your self-employment, you would need receipts for your expenses, and info on any income that's not on a T-slip. You also might need (if applicable): vehicle logbook, home office info, COGS info, GST/HST collected, etc...
You also may need to upload info for the personal tax part of your return, like medical receipts, child care receipts, etc...
