I am trying ITA also and I had the same issue.  Dividends, state tax refund, taxable 529 plan withdrawal, state and local tax payments, QBI deduction, and non-cash charitable contributions were omitted from the 2021 sync.  Some (but not all) of the Sch C expenses show up, but they are not subtracted from revenues anyway.  S/E tax deduction is close but incorrect.  I cannot determine how the subtotals for total income, AGI, and taxable income were calculated but none of them match the return and they are each off by different amounts.  The state tax $10,000 limit and the donations totals are correct, but some of the underlying pieces are missing.  It would be helpful to be able to correct 2021 data in the 2021 actual column, similar to Tax Planner.