There are several ways to deal with the tail. If you are knitting that has a definite front and back, and the back will not be seen, you can just knit the tail in when knitting your first row. I would leave about a 9" tail to do it this way.

Or you can weave the end in with a needle.

Here is a link that might be useful: weaving ends in as you knit

thank you, I will try that

I like to leave the tail evident, till I finish whatever it is I'm working on, to clearly show the beginning of the work (I generally work in the round, so I've found this is a good way to instantly know if I'm approaching the "beginning" of a new row. When I've finished I work it through the finished product, in and out....sometimes I use a blunt nosed wool needle, but more often, just use a crochet hook....and, be sure to do this from the front side, so you can see what you're doing on the part of the product that will be seen. I generally work one way for a while and then completely reverse directions....thinking that turn will keep my tail from accidentally being pulled out.