I-751 NOA questions about the one year extension

[Sofia 23 0]

I sent my I-751 package last month' and I jsut got the first NOA syaing I have another year of extension, does that mean form the date I sent the I-751 or the expiration date of my provisionary green card of two years?

[wifey246 0]

1 year from the expiration of your conditional GC

[israel0218 0]

from the date your green card expires add a year to that.