I just now downloaded the latest program updates (4/11/19) for my 2018 federal return and my tax due went up by over $1000. What were the changes?

[fanfare]

Always print a copy of your completed tax return for your records, and review it carefully before e-Filing.

You will need it if you are audited by the IRS, or to amend because a TurboTax update changes your return.