When I turn my work, which stitch do I crochet into? The first stitch or the next one?

When I turn my work, which stitch do I crochet into? The first stitch or the next one?

When working with single crochets in rows...Ch 1 to turn. The top of each single crochet will look like a little heart--there is a front loop and a back loop. Unless the pattern instructs otherwise, you will crochet each stitch under both loops. With single crochet, you stitch directly into the top of the single crochet after the ch 1.

When working with double crochet rows....Ch 3 to turn. If your ch 3 is puffing out and causing an unsightly bulge at the end, feel free to try a ch 2 to see how it works. With double crochet, you SKIP the first stitch. Your ch 3 counts as the FIRST stitch (making it different from single crochet rows which don't count the ch-1 as the FIRST stitch).