You should not file an amended return until IRS has completed processing of the original return filed. It may take 4 weeks or more after you have e-filed your return.
The 1040X form for paper filing and e-filing will be available about 3/26/2021.
Please refer to the following link for the TurboTax Expected Availability date for federal forms for the version of TurboTax you are using:
TurboTax Expected federal forms availability link
Please refer to the following link for requirements for filing the head of household filing status:
Do I qualify to file head of household
