Every time someone completes a typeform, they have to tap the Submit button, at which point the answers are sent to your account.
This article explains how it behaves and how to edit it.
Where does the Submit button appear?
Respondents will see the Submit button right after the last question or field of your typeform. When they tap it, that sends their answers to your Typeform account, and then shows them an Ending screen.
Can I change the text of the Submit button?
Yes! Go to Settings, then click Messages:
Scroll down until you see Button to send typeform. Click on the text to edit it:
Payment and Statement question behavior with the Submit button
Because the Submit button appears at the end of your last question, it will replace the standard button on Statement and Payment questions.
If your typeform is going to end on a Statement or Payment question, and you want to change the text in the button, you must change the Submit button text, as above.
Therefore, changing the Button text on the question, will have no effect if this is your last question:
To change the button text, go into Settings > Messages to change the Button to send typeform text: