Troubleshooting

Both issues are still being looked into.

As a workaround, you can enter the T3 on both spouse's return, but manually calculate the split and set the "Your Percentage" value to 100% for each. The "Your Percentage" value just tell TurboTax to do the split, it's not transmitted to the CRA.

For the FHSA issue, 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.