my 1099-INT downloaded from Schwab and TurboTax auto-checked the box labeled my form has info .., but filled in only box 12 with 0.00. ACTUAL form has 0.00 in box 3-13?

Don't enter 0, leave the boxes empty.

If you get any error message regarding the 0 in box 12, delete the imported form and re-enter manually.

1. Open or continue your return.
2. Select  Federal, then Wages & Income.
3. Scroll down to Interest and Dividends, then select update next to Interest on 1099-INT. 
4. On the screen Let’s finish pulling in your investment income select the trash can next to the 1099-INT.
5. Click on Add Investment then skip import

In TurboTax Online:

1. Select  Federal, then Wages & Income.
2. Scroll down to Investments and Savings (1099-B, 1099-INT, 1099-DIV, 1099-K, Crypto)
3. On the screen Let’s finish pulling in your investment income select the trash can next to the 1099-INT.
4. Click on Add Investment then Enter a different way