IRS Letter 5071C and filing a return

We received a Letter 5071C from the IRS informing us that someone filed a tax return using my daughter’s name and SSN. We followed their instructions to verify my daughter’s  identity using ID.me. This involves a video interview and showing proof of identity. As far as I know l, that’s all

we needed to do. However, since then, I have tried to file my 2021 tax return but it keeps getting rejected because my daughter is listed as a dependent and the IRS is still flagging her SSN as belonging to a an individual tax return that has already been filed. Any suggestions?