Thank you for using Just Answer. When you are married you have two options on your federal return, Married Filing Separate (MFS) or Head of Household (HOH) if you qualify. You do not have to have a legal separation in order to file HOH. However, in order to qualify for HOH you must have lived apart from your spouse for the last six months of the tax year, you do not file a joint tax return with your spouse, you paid over half of the cost of keeping up the home for the tax year, your home was the main home of your children for over half of the tax year, and you claim these children as dependents or your spouse claims them as dependents under the divorced or separated parents rules. As for PA state tax though, they do not have a HOH status. So, it looks as though you would be MFS for your state returns.Please let me know if you have need more information regarding this issue. I will be more than happy to assist you.