"The temporary workaround:
Take the amount in 16A/17A and move it to 16/17."
If it was not a software issue then no "workaround" would be required at all.
As already mentioned, there are several valid reasons why a T4 may have a number in 16A/17A with no number in 16/17, so TurboTax should recognize this. The logic should be as easy as checking to see another T4 has been already entered and, if so, has its box 16/17 already been maxed out.
