Need help

Picked up a project that I started 6 years ago (a sweater) and just finished the back and have to cast off 4 stitches in the next two rows then places stitches on a holder. What do I do with the ball of yarn that is attached? I forget because I haven’t knitted in so long! Thanks

Welcome to KnittingHelp!
What pattern are you making? Can you post a link or tell us the name?
You can read ahead and see what happens to the stitches on the holder but usually you would cut the yarn leaving about a 4-6inch tail to weave in later.

I am making a Debbie Bliss Cropped Cardigan from 2009!!I read ahead and it asks you to places stitches on holder after finishing each piece(back,left and right front,and sleeves. Further on you slip all held stitches onto a circular needle>

I am making a Debbie Bliss cropped cardigan from 2009!! I read ahead and it asks you to leave stitches on a holder after finishing every piece,back,left and right front,and sleeves. Then it tells you to slip all held stitches onto a circular needle.

Hi it seems like you are only using one colour.

If you are I would just leave the ball attached to prevent knots and wasted time sewing or knitting in ends. Just make sure the first picked up stitch is not tight if you need to pick up for a collar.

I found two similar patterns on Ravelry.
http://www.ravelry.com/patterns/library/lucia---cropped-ribbed-jacket

Sounds like they’re knit from the bottom up, all the pieces are held on stitch holders and then joined on one needle for the yoke knitting with raglan sleeves. If so, I would only leave the yarn attached to the piece that you knit first once all the pieces are joined for the yoke. That’ll be the right front starting at the neck edge on the RS row or the left front neck edge if you’re starting on the WS row.
For the back you can certainly cut the yarn leaving about a 4-6 inch tail to weave in later.