After you have entered all the necessary information, you should proofread your tax return once more by clicking on "Summary" on the lower left-hand side.
If the data are correct, you will purchase your tax return in the following step, and will be taken through the submission process.
You can then download the draft tax return and proofread it one more time (step 1 of 3).
If everything is in order, you approve the draft (step 2 of 3).
Afterwards you can chose if you want to submit your tax return online or via post (step 3 of 3).