Ordinarily, I would say that you do not have a filing requirement and would only file a tax return for the reasons you stated. Let's address these one at a time:
Since there was no new legislation in 2022 to extend the "Lookback Provision," you will have to use your 2022 income which falls short of the EITC Credit Threshold. If that were the only reason I would not file a tax return.
If FAFSA requires you to provide a tax return that may be a legitimate reason for filing a return. You will have to determine which position is better for your dependent daughter in regards to her domicile which can either be London with you or California (USB) if she will be considered an International Student and subject to out of state tuition. You will have to the support element of dependency to consider if you choose not to use London as her domicile.
For further information on dependency, please see the IRS link below:
https://www.irs.gov/faqs/filing-requirements-status-dependents/dependents/dependents-2#:~:text=To%20....
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