it's not that she works that affects your taxes. you have a dependent which may qualify you for certain tax creits that you would otherwise not get.
depending on the amount of her income she may have to file her own return. to do that with online you need to create a separate account for her with a unique user name but you can use the same e-mail adress.
see the filing requirements. both charts B and C
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
or you can check using the iRS wbsite
https://www.irs.gov/help/ita/do-i-need-to-file-a-tax-return
