If married you cannot file single unless you have a formal court approved legal separation decree with separate maintenance (about the same as alimony) and can only be undone with a court order.
Only a few states have legal separation. Very few people use that any more since divorce is usual easier and has no advantages over divorce.
Your account should stick to accounting and not give tax advice.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
