Key Points ・You usually have up to 3 years to amend your tax return to fix errors. ・Use Form 1040-X to report the changes to the IRS. ・You must include any forms that changed (W-2, 1099, 1098-T). You ...

Tax season: W2 forms and how to file for free online January 31 is the deadline for employers to give out W-2 forms. The deadline to file is April 18.