I need to amend my 2016 tax return from head of household to married filing single.

If you have not yet filed, use the following steps to change your filing status;

• Log into your Turbo Tax account
• Select Personal Info.
• Scroll down until you get to filing status (see screen shot below)
• Select the edit button and change

If you have already filed, it is best to wait until you have received your refund before making the change.  If you are not expecting a refund you can complete your amendment once the amendment forms are available in February.  You can amend your return, learn more about filing your amendment with the IRS by reading How To File An Amended Return With The IRS.  You can make amendments in Turbo Tax by selecting the year you would like to amend in the link below.  The amendment for 2016 will not be available until February 2017.

To amend your return in Turbo Tax

https://ttlc.intuit.com/replies/3288565