I made some changes to my tax return using ReFILE but it says the status is "in progress". I am not sure if it was properly submitted to the CRA. Please help!

When you successfully ReFile your income tax return, you will receive a confirmation number.  If you received a confirmation number, your ReFile was successfully transmitted to the Canada Revenue Agency.

By confirmation number, do you mean the "Order Receipt" I received in my email? It has a Transaction Number. I do not remember seeing any button on screen for Netfiling