The smaller bag labeled "priming sugar" should not be added until bottling ... I think you already know that because you didn't ask, but just making sure.
Is the larger bag of sugar labeled with what kind it is, and how much? My guess is it's either maltodextrin (unfermentable) for extra body, or dextrose/corn sugar (fermentable) for extra alcohol.
Either maltodextrin or dextrose would be added to the wort while it's boiling. If it's labeled as something else, let us know.
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