You can dispute the following questionable items:
Credit account-related Disputes: Charge-offs, late payments, missed payments, collections, repossessions, student loans, installment loans, auto loans, mortgage foreclosures.
Public records: These include, IRS tax liens, state tax liens, judgments, and bankruptcies.
Credit Inquiries: Requests for your personal credit report, aka credit inquiries, are recorded by the credit bureaus and kept on record for 2 years.
Personal information: You can dispute to get removed or have the bureaus update all your personal information.