After you file

Your description of what you did with your return and your GF's return is pretty confusing.  But it sounds like her return was filed claiming you as her dependent for 2019 --- and she should not have claimed you--is that it?

Her return that claimed you has to be amended to remove you as a dependent.  That amended return can only be filed by mail.  Amended returns take months for the IRS to process and are taking even longer now.  

You do not have to wait for her amended return to be processed.  You can file your own return that says you cannot be claimed as someone else's dependent, but your return has to be submitted by mail.  That is because your SSN is already in the system for this year, and that will not change anytime soon.  

You can expect your own mailed return to take longer than usual to be processed, unfortunately.  The IRS is backlogged, and they are not opening or processing mailed returns until later.

https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...

MAILED RETURNS

Per the IRS website IRS Operations During COVID-19: Mission-critical functions continue: The IRS is not currently able to process individual paper tax returns. If you already have filed via paper but it has not yet been processed, do not file a second tax return or write to the IRS to inquire about the status of your return or your economic impact payment. Paper returns will be processed  once processing centers are able to reopen. 

If you mail a tax return (or a payment) to the IRS, 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.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. 

TurboTax will not know anything about your mailed return, and will continue to show “Ready to Mail” on your account.  TurboTax will not know that you put your tax return in an envelope and took it to a mailbox.  TurboTax does not get updates on mailed  (or e-filed) returns.

When the IRS finally opens its mail and begins to process mailed returns you can check the status on the IRS site. https://www.irs.gov/refunds

State returns have to be mailed to the state.

https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund

For your GF to amend:

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

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

Note:  It will be longer than 3 weeks during the pandemic.

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