What needs to be sent to the IRS with mailed tax forms? I have e-filed my forms for the last 10 years, this year Turbo Tax won't let me. So I don't know what needs to be.

What you need to mail will be listed on the Filing Instruction page. To view your Filing Instruction page, please see these steps below:

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, read the entire page carefully. What you need to mail and the address to send it to will be listed by What you need to mail section.

To get a copy of your State 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 (name of your state) 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, read the entire page. What you need to mail and the address to send it to will be listed by What you need to mail section.