Mistakenly submitted tax without realizing it was a send button I only made my profile but everything including T4 T5 forms totally left empty. what should I do next??

Thank you for contacting TurboTax. Unfortunately, once you have filed your return you must wait for NOA (Notice of Assessment) to amend your return as CRA might catch the error.

For further information, please check this link as well: I have filed my tax return. Can I still make changes?