Answering my own question:
TurboTax Home & Business 2023 does not automatically carry over capital losses from the previous year's Massachusetts return (schedules B and D). I had to enter them myself as follows:
- Copy from 2022 MA schedule B, line 23 ("Short-term losses available for carryover in 2023"), to 2023 MA schedule B, line 18 ("Prior short-term unused losses for years beginning after 1981").
- Copy from 2022 MA schedule D, line 23 ("Massachusetts available losses for carryover"), to 2023 MA schedule D, line 8 ("Carryover losses from prior years").
This is arguably a bug in TurboTax Home & Business 2023. I hope this info helps others.
