Entering a withdrawal from a Roth IRA It asks for me to enter my net regular contributions prior to 2021 that remain in my account. What does that mean?

[JohnB5677]

This is asking for the sum of all regular ROTH IRA  contributions that you made prior to 2021.  This may be being used to establish a basis in the account.

While Roth contributions are not reported on your tax return, it is a good idea to enter them in the IRA contribution section anyway because TurboTax will:

• track the basis of your contributions for you year-to-year. [This becomes important when you start making withdrawals--to track how much of the distribution is taxable.]
• alert you if your MAGI exceeds the Roth contribution limit and are subject to a penalty.
• alert you if you have insufficient earned compensation to contribute.

  You do not need to include contributions to a Roth in your return

  While Roth contributions are not reported on your tax return, it is a good idea to enter them in the IRA contribution section anyway because TurboTax will:

• track the basis of your contributions for you year-to-year. [This becomes important when you start making withdrawals--to track how much of the distribution is taxable.]alert you if your MAGI exceeds the Roth contribution limit and are subject to a penalty.
• alert you if you have insufficient earned compensation to contribute.

[katieA1]

So the total amount of contributions from when I first opened the account to the end of 2020? 

[MinhT1]

Yes. You are correct.