Same problem with Schwab 1099-OID (Box 10 with a number, Box 2 blank or zero).
I tried what I believe was your recommendation to zero out 1099-OID Box 10, then I entered that same dollar amount into the TurboTax Schwab 1099-INT Worksheet in the "Adjustments to Interest" section, with Box T checked. The instructions state to enter adjustment amount (positive if subtracting / negative if adding). I entered a positive number xxx.xx that matched what I removed from 1099-OID Box 10.
When I ran the TurboTax check, it then complained that 1099-INT had a problem: "The bond premium adjustment of xxx.xx reported on this Form 1099-INT (CHARLES SCHWAB & CO., INC) is greater than the related Box 8 tax-exempt interest of yyy.yy. You must reduce the bond premium amount reported on this 1099-INT to the amount of Box 3. Any excess amount is a nondeductible loss."
If I reduce that Box T "Adjustment to Interest" to be zero (to match my 1099-INT Box 3), then the TurboTax check shows no errors.
Did you experience the same issue?
