Clicked "I want to use a different address", just told me to change it on my Intuit account (which I did) but the mailing addresses for the checks are still unchanged.

[Bsch4477]

You can change the tax return mailing address in the My Info section of the program.

Click on My Info on the left side of the online program screen.  Edit the mailing address.

[Bsch4477]

You can change the tax return mailing address in the My Info section of the program.

Click on My Info on the left side of the online program screen.  Edit the mailing address.

[VolvoGirl]

Have you already filed?  Where did you click on use a different address?  Are you trying to amend your return?  If you have not filed yet you can it under My Info. If you have filed you can change your address at the IRS.

IRS address change form

https://www.irs.gov/pub/irs-pdf/f8822.pdf

[rjs]

"the mailing addresses for the checks are still unchanged."

Mailing addresses for what checks? It's not clear what address you are trying to change. Where in TurboTax is the address?