I e-filed my fed taxes and chose to mail in my check. However, turbotax didn't give me the voucher or instructions on where to mail it...

To view your Filing Instruction page,please follow these steps:

To get a copy of your federal tax return along with the Filing Instructions page:

1. Log into your TurboTax account
2. Scroll to the bottom of page, click Add a State( you are not adding a state, this is just to get in the right menu)
3. Over to the left, click Tax Tools dropdown
4. Click the Print Center
5. Click the Print, save or preview this year's return
6. Check 2018 Federal returns
7. Select Include government and TurboTax worksheets (optional)
8. Then,click View or print forms, and the Filing Instructions page will be the very first page. What you need to mail and where will be listed by What you need to mail. Please review the entire PDF document.