Question on amended return refund amount

Hi.  I submitted my NY state tax return a while back and am scheduled to receive my refund tomorrow.  Rounding, assume my refund was $1,000.   After submitting the return, I realized that I omitted an adjustment that would give me an additional $90 on my refund.  I used the amended return feature in Turbotax and it's showing a refund amount of $1,090.  I'm just checking if that's the way it works and I will eventually get an additional refund of $90, or did I do something wrong?

Thanks.

Brian