If you qualify to file HEad of Household, then that's what you should be claiming. It's a higher standard deduction. You can only amend a tax return for the current tax year and three years back. Note that an amended return can not be e-filed. The IRS says so. You have to print, sign and mail an amended return to the IRS. Mail each year in a physically separate envelope too. Amended returns take anywhere from 4-8 weeks to process, and sometimes longer.
Read the information at <a rel="nofollow" target="_blank" href="
https://turbotax.intuit.com/tax-tips/family/guide-to-filing-taxes-as-head-of-household/L4Nx6DYu9">ht...> to see if you qualify to file HOH not only for this year, but for past years up to 3 years back.
