I had an RRSP in Canada, and I withdrew from it in 2021. How do I report this on the 1040?

To enter Canadian RRSP in TurboTax Online:

1. In the top banner, select tab Federal taxes 

2. Select Wages & Income 

3. Scroll down to Retirement Plans and Social Security, and click the Show more dropdown

4. Here, you’ll see Canadian Registered Pension Income.  Select Start and enter your relevant information.

To compute foreign tax credit, go to:

1. In the right upper corner type foreign tax credit in the search box and Enter 

2. Select Jump to foreign tax credit 

3. At the Foreign Taxes screen, select Continue and follow the prompts.

When you're a U.S. citizen or resident, you need to report all of your income, whether it was earned in the U.S. or abroad.