Our development team is looking into this issue. The work around is to either just put in $0.01 instead of zero, or you can over-ride Line 43 to claim zero deduction and have the full amount carry forward. This will not harm your ability to NETFILE.

Overriding is not an option in the Home & Business desktop version.  It only works with 0.01 or greater.  Entering 0 defaults to no entry.

You need to override Line 43, not the box above it that won't except a zero.

Turbo Tax will not allow me to override line 43.  I get an error message telling me I am trying to change the value of a calculated field when I try entering $0 in line 43.  I am presented with an option to select "ok" which leaves the field as it was or "Help". There is no override option. It only works if I put in $0.01 in the line above.

Have you made sure to click into the number in Box 43?