It depends; some brokerage info may not import. I'm not sure where the TurboTax accuracy guarantee fits in. However, in my opinion, it is best to review what was reported on official forms vs what was imported.
one example of what doesn't import is income and expenses from WIDELY HELD FIXED INVESTMENT TRUSTS
Believe it or not, OID on bonds is generally incorrect. The IRS dictates it must be calculated based on the actual original issue discount. Buyers in the secondary market may have a different amount. The brokers DO NOT adjust. The taxpayer must make their own calculation of the adjustment. The tax software doesn't matter because the info comes from the broker
