How do I go about adding my wife’s 1099g to already filed taxes?

If you already filed your tax return and did not include some of your income then you have to wait for the return to be fully processed and then prepare an amended tax return to add the income. 

Going forward---if you are using this software----even if you think the software did not not "ask" for some income, you know what income you received so you should seek help to get it all entered before you e-file.   We can help with how and where to enter your income.

Yes, @xmasbaby0 is correct. We are available to help the tax filing will include everything.

For more information, see: Where do I report a 1099-G for unemployment or paid family leave?

@johnatannazario3