I filed a joint and submitted for stimulus. I did not enter my wife's W2 for return. Now She needs to file her return to get her unemployment. How we can correct it?

AFTER your return has been processed you will have to amend it to add your spouse's income..Trying to amend while it is still being processed could confuse the IRS and delay your refund for a long time.

ALL of your W-2’s and/or 1099’s were supposed to be on the same tax return.  Remember that next year and do not e-file until you have everything.  Now you have to prepare an amended return to add that W-2

https://ttlc.intuit.com/questions/2566895-what-does-it-mean-to-amend-a-return

How do I amend my 2019 TurboTax Online return?

A 1040X cannot be e-filed.  It must be printed and mailed.  It will take about 4 months for the IRS to process an amended return.  It is a good idea to use a mailing service that will track it, like UPS or certified mail, so you will know it was received.

Wait about 3 weeks from mailing and you can check the status of your amended return:

https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1

https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/amended-return-frequently-asked-questions

https://ttlc.intuit.com/questions/1908543-do-i-need-to-amend