I don't know whether to file single or married separately. My husband and I lived in different houses but we're still legally married,========>>>>>>>no single UNLESS you are divorced/separated . If you're legally separated and not all states recognize this concept , then,you can file as a single taxpayer even if you're not divorced by Dec. 31. In this case, the IRS accepts your decree of separation as sufficient proof that your marriage has ended.
If you were still legally married on the last day of the year, you typically cannot file your taxes as a single taxpayer. even if you were no longer living with your spouse. It's usually more beneficial to file as head of household if you qualify and you can potentially qualify even if you and your spouse are just living separately without a decree or judgment.
he was on disability another member of his household claimed him last year and I filed married seperate. He passed away in June of last year. So now I'm uncertain on how to file.=========>>>>>>Then ,no.as he was claimed by another; Spouses are not dependents of each other. Instead, husbands and wives can choose either
to file a joint tax return or to file two separate returns. If you file a separate return, you can claim the exemption for your spouse only if your spouse had no gross income, is not filing a return, and was not the dependent of another taxpayer."