Married couples who filed joint federal returns but I have a brokerage account only in my name. Can I allocate the capital gains 50 50 for taxes?

To clarify, since you files a joint federal return, are you also filing a joint Maryland State return? 

Yes federal and state

Thank you.

Since the account is in your name only, you would not be able to allocate 50/50.

I figured, taxes don't follow family law.  It's half hers legally. Next step put it in her name for next year. Thanks 

I made a mistake in entering different buy dates. It didn't matter. Whew! Thanks for your help.