I Purchased 100(.25% Cut) Steem off of Poliniex and was not sure how to convert that to my account but I learned from the account above it was extremely simple.
Purchase steem once it is in your Deposits & Withdrawals Tab you simply hit withdraw.
Above screenshotted is how the information should be arranged
Set Up Withdraw From Poloniex
Address: Your Steemit Username "Like So"
Memo: Click on wallet, permissions it is the last address and should begin with "STM"
Amount: How much you wish to deposit onto your Steemit.
-Check for email to accept/confirm withdraw.
Once It Hits Your Steemit account, Click Steem Then Power Up & Voilà
Please Upvote If This Helped You