How do I add my dependents w3? It’s only 2 months of work so she didn’t want to file dependently

You mean a W2?  You don't include their income on your return. It would only go on their return if they are required to file one.  To file a separate return for your dependent you need to set up a new account.  Online is only good for one return per account.  You can use the same email address for 5 accounts.

How to start a new online return

Https://ttlc.intuit.com/questions/1894512-how-do-i-start-another-return-in-turbotax-online 

Be sure on their return they check the box that says they can be claimed on someone else’s return.  If their only income is W2 and under 13,850 they do not have to file a return except to get back any withholding taken out.

Filing requirements for a dependent

https://ttlc.intuit.com/community/children-dependents/help/do-i-need-to-file-my-own-taxes-if-i-m-a-dependent/00/26111

You do not enter a dependent's earned income from work at reported on a W-2 on your tax return.  If the wages were under $13,850 she does not have to file a return unless there were taxes withheld, then she should file a tax return to get a refund of the taxes withheld.  If she does file make sure that she indicates on her return that she can be claimed as a dependent.

You do not file a dependents income on your tax return. If the income amount was enough to require filing, the dependent must file their own return.  A single person with less than $13,850 of income in 2023 is not required to file a return. However, if federal income tax was withheld, the person should file a tax return to get a refund. If the person files a return, they should indicate on the return that they can be claimed by someone else as a dependent.