Just get ready - we got our first CP11T notice today.  Lacerte calculated 2018 DPAD correctly and attached required statement per PUB 535 (pg 57) for adjusting line 10 on 1040.  Evidently, IRS computer can't handle this and doesn't allow the 2018 DPAD deduction on e-file.  CP11T ignores DPAD and refigures the tax.  From now on you must file paper if you have 2018 DPAD - and as a bonus you get respond to IRS notices for all returns with 2018 DPAD you previously e-filed.