Yes, you can change your mind and file a joint return no matter what you indicated on your W-4 at work. Your W-4 just tells the employer how much tax you want to have withheld. It does not dictate how you have to file your tax return. married filing jointly is almost always a better way to file. Both spouses must agree to file the joint return.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
