If you have not lived with your spouse at any time in the last six months of the year, you have a dependent child being reported on your tax return and have paid over one-half the cost of maintaining your home, you should be able to file as Head of Household.
See this TurboTax support FAQ for HOH when you are married - https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/married-person-claim-head-house...
