I received a W2-C form. I received my 2021 tax return. I need to amend it. Should I update W2 form for amendment or should I upload W2-C form? How can I upload W2-C?

[ramezaniz-ymail-]

I cannot find any option for uploading the W2-C form. 
I found an option in which I can update the W2 form. Is that what I am looking for?
 If I update the W2 form will it be OK? Is there anything else I should do?

[Mike9241]

what boxes changed? certain changes do not have to be reported

[ramezaniz-ymail-]

It is box 1 and box 12a.

[Critter-3]

How to amend (change or correct) a return you already filed

https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-...

[xmasbaby0]

You are not going to "upload" your W-2C.  Enter it by keying in the information yourself.

[Critter-3]

Also you will not enter a new W-2 in the program  instead once you start the amendment process you will return to the original W-2 input screen and simply correct the boxes needed with the corrected information.