How can I change my last name back after divorcing help?

let’s say the husband files to divroce first , and forgets mention I want change my last name back, do I need not sign til he files new forms stating I want last name back after divorce is finished? My mom said I cannot get my last name back if he files to divorce first, so I’ll be stuck forever with that guys last name? Im so confused. Am I not able demand on my own to the court I want last name back when divroce is finished if he files to divorce first? Im filing to divorce til the 28 Monday, I cannot do it now as im paid until that day on Monday. we don’t live together but he had said he was going to file to divorce soon. So there’s chance he’ll beat me and do it first.

How can I change my last name back after divorcing help?
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