Can i convert my TD to a TN1 visa?

Question Details:

I am Canadian citizen; my husband also a Canadian citizen. We came on his TN1 visa and I was on TD. Then 2 months ago his company change his status in to H1B so I got H4. Now I got job offer for phlebotomist position which is part-time. I am willing to do this job and want to convert my visa in to TN1, is that possible? My employer wants me to start as soon as possible. How much time and fees involve in this kind of process?

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