I have the same issue and reported it to TT support 2 weeks ago. Have called in several time since and was told I would receive call back or it would be fixed in a couple days. Still no fix.
My starting scenario is very similar to yours. Imported from last year, a super basic form. For me I was able to narrow down the issue to being caused by dividends >= capital loss carryover. To the penny actually. Add one penny to the dividend amount and it crashes. Remove the penny (making it less than the capital loss) and it works. I passed this along to support, but still nothing.
