I think if you are married when you FILE your taxes you file married/filing seperately or married filing jointly.
If memory serves if you file married/separately it penalizes you.
at your JOB on your W-4 you can file
Single with zero dependants and have the higher taxes taken out weekly which would benefit you in April.
I would find a different tax attorney and ask these questions before getting married again.
It sounds like you would like to be married but it isn't a do or die issue for you both. So take your time, get the answers you need from qualified persons, (we are helpful to a point but we are only disney experts, not tax experts )
Let us know what you find out and decide.
And congrats on finding a great guy!