If your 2019 gross income was more the $4,200 then she cannot claim you. If she did then see needs to amend and remove you.
If you are 22 and not a full-time student and earned $22,000 then NOBODY can claim you as a dependent.
If your mother does not amend to remove you and pay any additional that that she owes the she can expect an IRS audit in about 1-2 years and a big bill for the back tax plus a lot of penalties and interest.
Since you are required to file a tax return the IRS will match your SSN with her return but that takes a year or two. She needs to fix it now before then IRS figures it out.