Don’t lie. Colleges frown on dishonesty. And as noted, getting financial aid when you knowingly provide dishonest/inaccurate information is considered fraud.
Really…your mom needs to amend her taxes to reflect an honest filing. But that’s a whole other thread.
Without the FAFSA, you won’t get a nickel of need based aid.
If you have to self fund college, you will need to work and pay as you go, starting perhaps at a local college where tuition is affordable, and you can continue to live with your mom.
Have you discussed this with her? How do you know her taxes are not correct?